Tetrazole compounds and their use as metabotropic glutamate receptor antagonists

ABSTRACT

The present invention relates to new compounds of formula I, wherein P, Q, X 1 , X 2 , X 3 , X 4 , R 1 , R 2 , m and p, are as defined as in formula I, or salts, solvates or solvated salts thereof, processes for their preparation and new intermediates used in the preparation thereof, pharmaceutical compositions containing said compounds, and to the use of said compounds in therapy.

FIELD OF THE INVENTION

The present invention relates to a new class of compounds, topharmaceutical compositions containing said compounds and to the use ofsaid compounds in therapy. The present invention further relates toprocesses for the preparation of said compounds and to new intermediatesused in the preparation thereof.

BACKGROUND OF THE INVENTION

Glutamate is the major excitatory neurotransmitter in the mammaliancentral nervous system (CNS). Glutamate produces its effects on centralneurons by binding to and thereby activating cell surface receptors.These receptors have been divided into two major classes, the ionotropicand metabotropic glutamate receptors, based on the structural featuresof the receptor proteins, the means by which the receptors transducesignals into the cell, and pharmacological profiles.

The metabotropic glutamate receptors (mGluRs) are G protein-coupledreceptors that activate a variety of intracellular second messengersystems following the binding of glutamate. Activation of mGluRs inintact mammalian neurons elicits one or more of the following responses:activation of phospholipase C; increases in phosphoinositide (PI)hydrolysis; intracellular calcium release; activation of phospholipaseD; activation or inhibition of adenyl cyclase; increases or decreases inthe formation of cyclic adenosine monophosphate (cAMP); activation ofguanylyl cyclase; increases in the formation of cyclic guanosinemonophosphate (cGMP); activation of phospholipase A₂; increases inarachidonic acid release; and increases or decreases in the activity ofvoltage- and ligand-gated ion channels. Schoepp et al., TrendsPharmacol. Sci. 14:13 (1993), Schoepp, Neurochem. Int. 24:439 (1994),Pin et al., Neuropharmacology 34:1 (1995), Bordi and Ugolini, Prog.Neurobiol. 59:55 (1999).

Eight distinct mGluR subtypes, termed mGluR1 through mGluR8, have beenidentified by molecular cloning. Nakanishi, Neuron 13:1031 (1994), Pinet al., Neuropharmacology 34:1 (1995), Knopfel et al., J. Med. Chem.38:1417 (1995). Further receptor diversity occurs via expression ofalternatively spliced forms of certain mGluR subtypes. Pin et al., PNAS89:10331 (1992), Minakami et al., BBRC 199:1136 (1994), Joly et al., J.Neurosci. 15:3970 (1995).

Metabotropic glutamate receptor subtypes may be subdivided into threegroups, Group I, Group II, and Group III mGluRs, based on amino acidsequence homology, the second messenger systems utilized by thereceptors, and by their pharmacological characteristics. Group I mGluRcomprises mGluR1, mGluR5 and their alternatively spliced variants. Thebinding of agonists to these receptors results in the activation ofphospholipase C and the subsequent mobilization of intracellularcalcium.

Neurological, Psychiatric and Pain Disorders.

Attempts at elucidating the physiological roles of Group I mGluRssuggest that activation of these receptors elicits neuronal excitation.Various studies have demonstrated that Group I mGluRs agonists canproduce postsynaptic excitation upon application to neurons in thehippocampus, cerebral cortex, cerebellum, and thalamus, as well as otherCNS regions. Evidence indicates that this excitation is due to directactivation of postsynaptic mGluRs, but it also has been suggested thatactivation of presynaptic mGluRs occurs, resulting in increasedneurotransmitter release. Baskys, Trends Pharmacol. Sci. 15:92 (1992),Schoepp, Neurochem. Int. 24:439 (1994), Pin et al., Neuropharmacology34:1 (1995), Watkins et al., Trends Pharmacol. Sci. 15:33 (1994).

Metabotropic glutamate receptors have been implicated in a number ofnormal processes in the mammalian CNS. Activation of mGluRs has beenshown to be required for induction of hippocampal long-term potentiationand cerebellar long-term depression. Bashir et al., Nature 363:347(1993), Bortolotto et al., Nature 368:740 (1994), Aiba et al., Cell79:365 (1994), Aiba et al., Cell 79:377 (1994). A role for mGluRactivation in nociception and analgesia also has been demonstrated.Meller et al., Neuroreport 4: 879 (1993), Bordi and Ugolini, Brain Res.871:223 (1999). In addition, mGluR activation has been suggested to playa modulatory role in a variety of other normal processes includingsynaptic transmission, neuronal development, apoptotic neuronal death,synaptic plasticity, spatial learning, olfactory memory, central controlof cardiac activity, waking, motor control and control of thevestibulo-ocular reflex. Nakanishi, Neuron 13: 1031 (1994), Pin et al.,Neuropharmacology 34:1, Knopfel et al., J. Med. Chem. 38:1417 (1995).Further, Group I metabotropic glutamate receptors have been suggested toplay roles in a variety of acute and chronic pathophysiologicalprocesses and disorders affecting the CNS. These include stroke, headtrauma, anoxic and ischemic injuries, hypoglycemia, epilepsy,neurodegenerative disorders such as Alzheimer's disease, psychiatricdisorders and pain. Schoepp et al., Trends Pharmacol. Sci. 14:13 (1993),Cunningham et al., Life Sci. 54:135 (1994), Hollman et al., Ann. Rev.Neurosci. 17:31 (1994), Pin et al., Neuropharmacology 34:1 (1995),Knopfel et al., J. Med. Chem. 38:1417 (1995), Spooren et al., TrendsPharmacol. Sci. 22:331 (2001), Gasparini et al. Curr. Opin. Pharmacol.2:43 (2002), Neugebauer Pain 98:1 (2002). Much of the pathology in theseconditions is thought to be due to excessive glutamate-inducedexcitation of CNS neurons. Because Group I mGluRs appear to increaseglutamate-mediated neuronal excitation via postsynaptic mechanisms andenhanced presynaptic glutamate release, their activation probablycontributes to the pathology. Accordingly, selective antagonists ofGroup I mGluR receptors could be therapeutically beneficial in allconditions underlain by excessive glutamate-induced excitation of CNSneurons, specifically as neuroprotective agents, analgesics oranticonvulsants.

Recent advances in the elucidation of the neurophysiological roles ofmetabotropic glutamate receptors generally and Group I in particular,have established these receptors as promising drug targets in thetherapy of acute and chronic neurological and psychiatric disorders andchronic and acute pain disorders.

Gastro Intestinal Disorders

The lower esophageal sphincter (LES) is prone to relaxingintermittently. As a consequence, fluid from the stomach can pass intothe esophagus since the mechanical barrier is temporarily lost at suchtimes, an event hereinafter referred to as “reflux”.

Gastro-esophageal reflux disease (GERD) is the most prevalent uppergastrointestinal tract disease. Current pharmacotherapy aims at reducinggastric acid secretion, or at neutralizing acid in the esophagus. Themajor mechanism behind reflux has been considered to depend on ahypotonic lower esophageal sphincter. However, e.g. Holloway & Dent(1990) Gastroenterol. Clin. N. Amer. 19, pp. 517-535, has shown thatmost reflux episodes occur during transient lower esophageal sphincterrelaxations (TLESRs), i.e. relaxations not triggered by swallows. It hasalso been shown that gastric acid secretion usually is normal inpatients with GERD.

The novel compounds according to the present invention are assumed to beuseful for the inhibition of transient lower esophageal sphincterrelaxations (TLESRs) and thus for treatment of gastro-esophageal refluxdisorder (GERD).

The wording “TLESR”, transient lower esophageal sphincter relaxations,is herein defined in accordance with Mittal, R. K, Holloway, R. H,Penagini, R., Blackshaw, L. A., Dent, J, 1995; Transient loweresophageal sphincter relaxation. Gastroenterology 109, pp. 601-610.

The wording “reflux” is herein defined as fluid from the stomach beingable to pass into the esophagus, since the mechanical barrier istemporarily lost at such times.

The wording “GERD”, gastro-esophageal reflux disease, is herein definedin accordance with van Heerwarden, M. A., Smout A. J. P. M., 2000;Diagnosis of reflux disease. Baillière's Clin. Gastroenterol. 14, pp.759-774.

Because of their physiological and pathophysiological significance,there is a need for new potent mGluR agonists and antagonists thatdisplay a high selectivity for mGluR subtypes, particularly the Group Ireceptor subtype.

SUMMARY OF THE INVENTION

In one aspect of the invention there is provided a compound according toformula I

whereinX₃ and X₄ are selected from N and C, such that when X₃ is N, X₄ is C andwhen X₃ is C,X₄ is N;P is selected from aryl and heteroarylR¹ is attached to P via a carbon atom on ring P and is selected from thegroup consisting of hydroxy, halo, nitro, C₁₋₆alkylhalo, OC₁₋₆alkylhalo,C₁₋₆alkyl, OC₁₋₆alkyl, C₂₋₆alkenyl, OC₂₋₆alkenyl, C₂₋₆alkynyl,OC₂₋₆alkynyl, C₀₋₆alkylC₃₋₆cycloalkyl, OC₀₋₆alkylC₃₋₆cycloalkyl,C₀₋₆alkylaryl, OC₀₋₆alkylaryl, CHO, (CO)R⁵, O(CO)R⁵, O(CO)OR⁵,O(CNR⁵)OR⁵, C₁₋₆alkylOR⁵, OC₂₋₆alkylOR⁵, C₁₋₆alkyl(CO)R⁵,OC₁₋₆alkyl(CO)R⁵, C₀₋₆alkylCO₂R⁵, OC₁₋₆alkylCO₂R⁵, C₀₋₆alkylcyano,OC₂₋₆alkylcyano, C₀₋₆alkylNR⁵R⁶, OC₂₋₆alkylNR⁵R⁶, C₁₋₆alkyl(CO)NR⁵R⁶,OC₁₋₆alkyl(CO)NR⁵R⁶, C₀₋₆alkylNR⁵(CO)R⁶, OC₂₋₆alkylNR⁵(CO)R⁶,C₀₋₆alkylNR⁵(CO)NR⁵R⁶, C₀₋₆alkylSR⁵, OC₂₋₆alkylSR⁵, C₀₋₆alkyl(SO)R⁵,OC₂₋₆alkyl(SO)R⁵, C₀₋₆alkylSO₂R⁵, OC₂₋₆alkylSO₂R⁵, C₀₋₆alkyl(SO₂)NR⁵R⁶,OC₂₋₆alkyl(SO₂)NR⁵R⁶, C₀₋₆alkylNR⁵(SO₂)R⁶, OC₂₋₆alkylNR⁵(SO₂)R⁶,C₀₋₆alkylNR⁵(SO₂)NR⁵R⁶, OC₂₋₆alkylNR⁵(SO₂)NR⁵R⁶, (CO)NR⁵R⁶, O(CO)NR⁵R⁶,NR⁵OR⁶, C₀₋₆alkylNR⁵(CO)OR⁶, OC₂₋₆alkylNR⁵(CO)OR⁶, SO₃R⁵ and a 5- or6-membered ring containing one or more atoms independently selected fromthe group consisting of C, N, O and S;X¹ is selected from the group consisting of C₂₋₃alkyl, C₂₋₃alkenyl, NR³,O, S, CR³R⁴, SO, SO₂X² is selected from the group consisting of a bond, CR³R⁴, O, S, NR³,SO, SO₂R³ and R⁴ are independently selected from a group consisting ofhydrogen, hydroxy, C₁₋₆alyl, CO₀₋₆alkylcyano, oxo, ═NR⁵, ═NOR⁵,C₁₋₄alkylhalo, halo, C₁₋₄alkylC₃₋₇cycloalkyl, C₃₋₇cycloalkyl,O(CO)C₁₋₄alkyl, (CO)C₁₋₄alkyl, C₁₋₄alkyl(SO)C₀₋₄alkyl,C₁₋₄alkyl(SO₂)C₀₋₄alkyl, (SO)C₀₋₄alkyl, (SO₂)C₀₋₄alkyl, OC₁₋₄alkyl,C₁₋₄alkylOR⁵ and C₀₋₄alkylNR⁵R⁶;Q is a 4-, 5-, 6-, or 7-membered ring containing one or more heteroatomsselected from N, O and S, which is optionally fused to a 5-, 6-, or7-membered ring containing one or more heteroatoms selected from N, Oand S;R² is selected from the group consisting of hydroxy, C₀₋₆alkylcyano,═NR⁵, ═O, ═NOR⁵, C₁₋₄alkylhalo, halo, C₁₋₆alkyl, C₃₋₆cycloalkyl,C₀₋₆alkylaryl, C₀₋₆alkylheteroaryl, C₀₋₆alkylcycloalkyl,C₀₋₆alkylheterocycloalkyl, OC₁₋₄alkyl, OC₀₋₆alkylaryl, O(CO)C₁₋₄alkyl,(CO)OC₁₋₄alkyl, C₀₋₄alkyl(S)C₀₋₄alkyl, C₁₋₄alkyl(SO)C₀₋₄alkyl,C₁₋₄alkyl(SO₂)C₀₋₄alkyl, (SO)C₀₋₄alkyl, (SO₂)C₀₋₄alkyl, C₁₋₄alkylOR⁵,C₀₋₄alkylNR⁵R⁶ and a 5- or 6-membered ring containing one or more atomsindependently selected from C, N, O and S, which ring may optionally befused with a 5- or 6-membered ring containing one or more atomsindependently selected from the group consisting of C, N and O andwherein said ring and said fused ring may be substituted by one or moreA; andany C₁₋₆alkyl, aryl, or heteroaryl defined under R¹, R² and R³ may besubstituted by one or more A; andA is selected from the group consisting of hydrogen, hydroxy, halo,nitro, oxo, C₀₋₆alkylcyano, C₀₋₄alkylC₃₋₆cycloalkyl, C₁₋₆alkyl,—OC₁₋₆alkyl, C₁₋₆alkylhalo, OC₁₋₆alkylhalo, C₂₋₆alkenyl, C₀₋₃alkylaryl,C₀₋₆alkylOR⁵, OC₂₋₆alkylOR⁵, C₁₋₆alkylSR⁵, OC₂₋₆alkylSR⁵, (CO)R⁵,O(CO)R⁵, OC₂₋₆alkylcyano, OC₁₋₆alkylCO₂R⁵, O(CO)OR⁵, OC₁₋₆alkyl(CO)R⁵,C₁₋₆alkyl(CO)R⁵, NR⁵OR⁶, C₀₋₆NR⁵R⁶, OC₂₋₆alkylNR⁵R⁶, C₀₋₆alkyl(CO)NR⁵R⁶,OC₁₋₆alkyl(CO)NR⁵R⁶, OC₂₋₆alkylNR⁵(CO)R⁶, C₀₋₆alkylNR⁵(CO)R⁶,C₀₋₆alkylNR⁵(CO)NR⁵R⁶, O(CO)NR⁵R⁶, C₀₋₆alkyl(SO₂)NR⁵R⁶,OC₂₋₆alkyl(SO₂)NR⁵R⁶, C₀₋₆alkylNR⁵(SO₂)R⁶, OC₂₋₆alkylNR⁵(SO₂)R⁶, SO₃R⁵,C₁₋₆alkylNR⁵(SO₂)NR⁵R⁶, OC₂₋₆alkyl(SO₂)R⁵, C₀₋₆alkyl(SO₂)R⁵,C₀₋₆alkyl(SO)R⁵, OC₂₋₆alkyl(SO)R⁵ and a 5- or 6-membered ring containingone or more atoms independently selected from the group consisting of C,N, O and S;R⁵ and R⁶ are independently selected from, H, C₁₋₆alkyl, C₃₋₇cycloalkyland aryl and salts and hydrates thereofm is selected from 0, 1, 2, 3 or 4p is selected from 0, 1, 2, 3 or 4or a salt or hydrate thereof.with the proviso that the compound is not:

-   1-[hydroxyl-(2-phenyl-2H-tetrazol-5yl)-methyl]piperidine;-   1-(2-phenyl-2H-tetrazol-5ylmethyl)-pyridine;-   1-(2-phenyl-2H-tetrazol-5ylmethyl)-piperidine;-   1-(2-benzothiazolyl)-4-[[5-(5-methyl-2-furanyl)-2H-tetrazol-2-yl]acetyl-piperazine;-   1-(4-acetylphenyl)-4-[[5-(5-methyl-2-furanyl)-2H-tetrazol-2-yl]acetyl]-piperazine,    or-   5-(5-methyl-2-furanyl)-N-(2-phenyl-2H-benzotriazol-5-yl)-2H-tetrazole-2-acetamide.

In a further aspect of the invention there is provided pharmaceuticalcompositions comprising a therapeutically effective amount of thecompound of formula I and a pharmaceutically acceptable diluent,excipients and/or inert carrier.

In yet a further aspect of the invention there is provided apharmaceutical composition comprising the compound of formula I for usein the treatment of mGluR 5 receptor mediated disorders, and for use inthe treatment of neurological disorders, psychiatric disorders,gastrointestinal disorders and pain disorders.

In still a further aspect of the invention there is provided thecompound of formula I for use in therapy, especially for the treatmentof mGluR 5 receptor mediated disorders, and for the treatment ofneurological disorders, psychiatric disorders, gastrointestinaldisorders and pain disorders.

In another aspect of the invention there is provided a processes for thepreparation of compounds of formula I, and the intermediates used in thepreparation thereof.

A further aspect of the invention is the use of a compound according toformula I for the manufacture of a medicament for the treatment orprevention of obesity and obesity related conditions, as well astreating eating disorders by inhibition of excessive food intake and theresulting obesity and complications associated therewith.

These and other aspects of the present invention are described ingreater detail herein below.

DETAILED DESCRIPTION OF THE INVENTION

The object of the present invention is to provide compounds exhibitingan activity at metabotropic glutamate receptors (mGluRs), especially atthe mGluR 5 receptors.

Listed below are definitions of various terms used in the specificationand claims to describe the present invention.

For the avoidance of doubt it is to be understood that where in thisspecification a group is qualified by ‘hereinbefore defined’, ‘definedhereinbefore’ or ‘defined above’ said group encompasses the firstoccurring and broadest definition as well as each and all of the otherdefinitions for that group.

For the avoidance of doubt it is to be understood that in thisspecification ‘C₁₋₆’ means a carbon group having 1, 2, 3, 4, 5 or 6carbon atoms. Similarly ‘C₁₋₃’ means a carbon group having 1, 2, or 3carbon atoms

In the case where a subscript is the integer 0 (zero) the group to whichthe subscript refers indicates that the group is absent.

In this specification unless otherwise stated the term “heteroatom”refers to an atom which is not carbon or hydrogen. Examples ofheteroatoms include but are not limited to nitrogen, oxygen, and sulfur

In this specification, unless stated otherwise, the term “alkyl”includes both straight and branched chain alkyl groups and may be, butare not limited to methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl,s-butyl, t-butyl, n-pentyl, i-pentyl, t-pentyl, neo-pentyl, n-hexyl ori-hexyl, t-hexyl. The term C₁₋₃alkyl has 1 to 3 carbon atoms and may bemethyl, ethyl, n-propyl or i-propyl.

In this specification, unless stated otherwise, the term “alkenyl”includes both straight and branched chain alkenyl groups. The term“C₂₋₆alkenyl” refers to an alkenyl group having 2 to 6 carbon atoms andone or two double bonds, and may be, but is not limited to vinyl, allyl,propenyl, i-propenyl, butenyl, i-butenyl, crotyl, pentenyl, i-pentenyland hexenyl.

In this specification, unless stated otherwise, the term “alkynyl”includes both straight and branched chain alkynyl groups. The termC₂₋₆alkynyl having 2 to 6 carbon atoms and one or two triple bonds, andmay be, but is not limited to ethynyl, propargyl, butynyl, i-butynyl,pentynyl, i-pentynyl and hexynyl.

In this specification, unless stated otherwise, the term “cycloalkyl”refers to an optionally substituted, saturated cyclic hydrocarbon ringsystem. The term “C₃₋₇cycloalkyl” may be cyclopropyl, cyclobutyl,cyclopentyl, cyclohexyl or cycloheptyl.

In this specification, unless stated otherwise, the term“heterocycloalkyl” refers to an optionally substituted, saturated cyclichydrocarbon ring system wherein one or more of the carbon atoms arereplaced with heteroatom. The term “heterocycloalkyl” includes but isnot limited to pyrrolidine, tetrahydrofuran, tetrahydrothiophene,piperidine, piperazine, morpholine, thiomorpholine, tetrahydropyran,tetrahydrothiopyran.

In this specification, unless stated otherwise, the term “alkoxy”includes both straight or branched alkoxy groups. C₁₋₃alkoxy may be, butis not limited to methoxy, ethoxy, n-propoxy or i-propoxy.

In this specification, unless stated otherwise, the term “halo” and“halogen” may be fluoro, chloro, bromo or iodo.

In this specification, unless stated otherwise, the term “alkylhalo”means an alkyl group as defined above, which is substituted with halo asdescribed above. The term “C₁₋₆alkylhalo” may include, but is notlimited to fluoromethyl, difluoromethyl, trifluoromethyl, fluoroethyl,difluoroethyl or bromopropyl. The term “OC₁₋₆alkylhalo” may include, butis not limited to fluoromethoxy, difluoromethoxy, trifluoromethoxy,fluoroethoxy or difluoroethoxy.

In this specification, unless otherwise stated, the term “aryl” refersto an optionally substituted monocyclic or bicyclic hydrocarbon ringsystem containing at least one unsaturated aromatic ring. Examples andsuitable values of the term “aryl” are phenyl, naphthyl,1,2,3,4-tetrahydronaphthyl, indyl and indenyl.

In this specification, unless stated otherwise, the term “heteroaryl”refers to an optionally substituted monocyclic or bicyclic unsaturated,aromatic ring system containing at least one heteroatom selectedindependently from N, O or S. Examples of “heteroaryl” may be, but arenot limited to thiophene, thienyl, pyridyl, thiazolyl, furyl, pyrrolyl,triazolyl, imidazolyl, oxadiazolyl, oxazolyl, isoxazolyl, pyrazolyl,imidazolonyl, oxazolonyl, thiazolonyl, tetrazolyl and thiadiazolyl,benzoimidazolyl, benzooxazolyl, tetrahydrotriazolopyridyl,tetrahydrotriazolopyrimidinyl, benzofuryl, indolyl, isoindolyl,pyridonyl, pyridazinyl, pyrimidinyl, imidazopyridyl, oxazolopyridyl,thiazolopyridyl, pyridyl, imidazopyridazinyl, oxazolopyridazinyl,thiazolopyridazinyl and purinyl.

In this specification, unless stated otherwise, the term “alkylaryl”,“alkylheteroaryl”, “alkylcycloalkyl” and “alkylheterocycloalkyl” referto a substitutent that is attached via the alkyl group to an aryl,heteroaryl, cycloalkyl and heterocycloalkyl group.

In this specification, unless stated otherwise, the term “5- or6-membered ring containing atoms independently selected from C, N, O orS”, includes aromatic and heteroaromatic rings as well as carbocyclicand heterocyclic rings, which may be saturated, partially saturated orunsaturated. Examples of such rings may be, but are not limited tofuryl, isoxazolyl, isothiazolyl, oxazolyl, pyrazinyl, pyrazolyl,pyridazinyl, pyridyl, pyrimidyl, pyrrolyl, thiazolyl, thienyl,imidazolyl, imidazolidinyl, imidazolinyl, triazolyl, morpholinyl,piperazinyl, piperidyl, piperidonyl, pyrazolidinyl, pyrazolinyl,pyrrolidinyl, pyrrolinyl, tetrahydropyranyl, thiomorpholinyl, phenyl,cyclohexyl, cyclopentyl and cyclohexenyl.

In this specification, unless stated otherwise, the term “4-, 5-, 6-, or7-membered ring containing one or more heteroatoms selected from N, Oand S, which ring is optionally fused to a 5-, 6-, or 7-membered ringcontaining one or more heteroatoms selected from N, O and S” refers to aheterocyclic or heteroaromatic ring which may be a saturated, partiallyunsaturated, or aromatic a ring Examples of such rings include, but arenot limited to morpholinyl, thiomorpholinyl, piperazinyl, piperidinyl,piperidonyl, pyrazolidinyl, pyrazolinyl, pyrrolidinyl, pyrrolinyl,thiomorpholinyl furanyl, thiophenyl, pyridinyl, pyrazinyl, pyridazinyl,pyranyl, oxazolyl, thiazolyl, imidazolyl, triazolyl, tetrazolyl,azetidinyl, oxytanyl, azepanyl, oxazepanyl, oxepanyl, diazepanyl,thiazepanyl, and azepine and partially or fully unsaturated versionthereof for example tetrahydropyranyl, dihydropyrazolyl and the like.This ring may be optionally fused to a second 5-, 6- or 7-membered ringwhich may be heterocyclic or heteroaromatic and which may be asaturated, partially unsaturated, or aromatic. The second or fused ringmay be independently selected from examples such as morpholinyl,thiomorpholinyl, piperazinyl, piperidinyl, piperidonyl, pyrazolidinyl,pyrazolinyl, pyrrolidinyl, pyrrolinyl, thiomorpholinyl furanyl,thiophenyl, pyridinyl, pyrazinyl, pyridazinyl, pyranyl, oxazolyl,thiazolyl, imidazolyl, triazolyl, tetrazolyl, azetidinyl, oxytanyl,azepanyl, oxazepanyl, oxepanyl, diazepanyl, thiazepanyl, and azepine andunsaturated variations thereof, such as tetrahydropyranyl,dihydropyrazolyl and the like. Examples of fused rings systems that maybe formed include but are not limited to isoquinoline, quinoline,quinazoline, quinoxaline, indole, indazole, indoline, benzoimidazole,benzooxazolyl, benzofuryl, imidazopyridyl, oxazolopyridyl,thiazolopyridyl, imidazopyridazinyl, oxalopyridazinyl,thiazolopyridazinyl, purinyl, tetrahydrotriazolopyridyl,tetrahydrotriazolopyrimidinyl, dihyrotriazolothiazine,tetrahydrotriazolopyrazine, tetrahydrotetraaza-azulene,dihydropyrollotriazol.

The term “fused” as used above refers to rings, which share two commonatoms.

In this specification, unless stated otherwise, the term “bond” may be asaturated or unsaturated bond.

In this specification, unless stated otherwise, the term “═NR⁵” and“═NOR⁵” include imino- and oximo groups carrying an R⁵ substitutent andmay be, or be part of, groups including, but not limited to iminoalkyl,iminohydroxy, iminoalkoxy, amidine, hydroxyamidine and alkoxyamidine.

In the case where a subscript is the integer 0 (zero) the group to whichthe subscript refers, indicates that the group is absent, i.e. there isa direct bond between the groups.

In this specification, unless stated otherwise, the term “bridge” meansa molecular fragment, containing one or more atoms, or a bond, whichconnects two remote atoms in a ring, thus forming either bi- ortricyclic systems.

In one embodiment of the invention there are provided compounds ofFormula I

whereinX₃ and X₄ are selected from N and C, such that when X₃ is N, X₄ is C andwhen X₃ is C,X₄ is N;P is selected from aryl and heteroarylR¹ is attached to P via a carbon atom on ring P and is selected from thegroup consisting of hydroxy, halo, nitro, C₁₋₆alkylhalo, OC₁₋₆alkylhalo,C₁₋₆alkyl, OC₁₋₆alkyl, C₂₋₆alkenyl, OC₂₋₆alkenyl, C₂₋₆alkynyl,OC₂₋₆alkynyl, C₀₋₆alkylC₃₋₆cycloalkyl, OC₀₋₆alkylC₃₋₆cycloalkyl,C₀₋₆alkylaryl, OC₀₋₆alkylaryl, CHO, (CO)R⁵, O(CO)R⁵, O(CO)OR⁵,O(CNR⁵)OR⁵, C₁₋₆alkylOR⁵, OC₂₋₆alkylOR⁵, C₁₋₆alkyl(CO)R⁵,OC₁₋₆alkyl(CO)R⁵, C₀₋₆alkylCO₂R⁵, OC₁₋₆alkylCO₂R⁵, C₀₋₆alkylcyano,OC₂₋₆alkylcyano, C₀₋₆alkylNR⁵R⁶, OC₂₋₆alkylNR⁵R⁶, C₁₋₆alkyl(CO)NR⁵R⁶,OC₁₋₆alkyl(CO)NR⁵R⁶, C₀₋₆alkylNR⁵(CO)R⁶, OC₂₋₆alkylNR⁵(CO)R⁶,C₀₋₆alkylNR⁵(CO)NR⁵R⁶, C₀₋₆alkylSR⁵, OC₂₋₆alkylSR⁵, C₀₋₆alkyl(SO)R⁵,OC₂₋₆alkyl(SO)R⁵, C₀₋₆alkylSO₂R⁵, OC₂₋₆alkylSO₂R⁵, C₀₋₆alkyl(SO₂)NR⁵R⁶,OC₂₋₆alkyl(SO₂)NR⁵R⁶, C₀₋₆alkylNR⁵(SO₂)R⁶, OC₂₋₆alkylNR⁵(SO₂)R⁶,C₀₋₆alkylNR⁵(SO₂)NR⁵R⁶, OC₂₋₆alkylNR⁵(SO₂)NR⁵R⁶, (CO)NR⁵R⁶, O(CO)NR⁵R⁶,NR⁵OR⁶, C₀₋₆alkylNR⁵(CO)OR⁶, OC₂₋₆alkylNR⁵(CO)OR⁶, SO₃R⁵ and a 5- or6-membered ring containing one or more atoms independently selected fromthe group consisting of C, N, O and S;X¹ is selected from the group consisting of C₁₋₃alkyl, C₂₋₃alkenyl, NR³,O, S, CR³R⁴, SO, SO₂X₂ is selected from the group consisting of a bond, CR³R⁴, O, S, NR³,SO, SO₂R³ and R⁴ are independently selected from a group consisting ofhydrogen, hydroxy, C₁₋₆alyl, C₀₋₆alkylcyano, oxo, ═NR⁵, ═NOR⁵,C₁₋₄alkylhalo, halo, C₁₋₄alkyl, C₃₋₇cycloalkyl (CO)C₁₋₄alkyl,(CO)C₁₋₄alkyl, C₁₋₄alkyl(SO)C₀₋₄alkyl, C₁₋₄alkyl(SO₂)C₀₋₄alkyl,(SO)C₀₋₄alkyl, (SO₂)C₀₋₄alkyl, OC₁₋₄alkyl, C₁₋₄alkylOR⁵ andC₀₋₄alkylNR⁵R⁶;Q is a 4-, 5-, 6-, or 7-membered ring containing one or more heteroatomsselected from N, O and S, which ring is optionally fused to a 5-, 6-, or7-membered ring containing one or more heteroatoms selected from N, Oand S;R² is selected from the group consisting of hydrogen, hydroxy,C₀₋₆alkylcyano, ═NR⁵, ═O, ═NOR⁵, C₁₋₄alkylhalo, halo, C₁₋₆alkyl,C₃₋₆cycloalkyl, C₀₋₆alkylaryl, C₀₋₆alkylheteroaryl, C₀₋₆alkylcycloalkyl,C₀₋₆alkylheterocycloalkyl, OC₁₋₄alkyl, OC₀₋₆alkylaryl, O(CO)C₁₋₄alkyl,(CO)OC₁₋₄alkyl, C₀₋₄alkyl(S)C₀₋₄alkyl, C₁₋₄alkyl(SO)C₀₋₄alkyl,C₁₋₄alkyl(SO₂)C₀₋₄alkyl, (SO)C₀₋₄alkyl, (SO₂)C₀₋₄alkyl, C₁₋₄alkylOR⁵,C₀₋₄alkylNR⁵R⁶ and a 5- or 6-membered ring containing one or more atomsindependently selected from C, N, O and S, which ring may optionally befused with a 5- or 6-membered ring containing one or more is atomsindependently selected from the group consisting of C, N and O andwherein said ring and said fused ring may be substituted by one or moreA; andany C₁₋₆alkyl, aryl, or heteroaryl defined under R¹, R² and R³ may besubstituted by one or more A; andA is selected from the group consisting of hydrogen, hydroxy, halo,nitro, oxo, C₀₋₆alkylcyano, C₀₋₄alkylC₃₋₆cycloalkyl, C₁₋₆alkyl,—OC₁₋₆alkyl, C₁₋₆alkylhalo, OC₁₋₆alkylhalo, C₂₋₆alkenyl, C₀₋₃alkylaryl,C₀₋₆alkylOR⁵, OC₂₋₆alkylOR⁵, C₁₋₆alkylSR⁵, OC₂₋₆alkylSR⁵, (CO)R⁵,O(CO)R⁵, OC₂₋₆alkylcyano, OC₁₋₆alkylCO₂R⁵, O(CO)OR⁵, OC₁₋₆alkyl(CO)R⁵,C₁₋₆alkyl(CO)R⁵, NR⁵OR⁶, C₀₋₆NR⁵R⁶, OC₂₋₆alkylNR⁵R⁶, C₀₋₆alkyl(CO)NR⁵R⁶,OC₁₋₆alkyl(CO)NR⁵R⁶, OC₂₋₆alkylNR⁵(CO)R⁶, C₀₋₆alkylNR⁵(CO)R⁶,C₀₋₆alkylNR⁵(CO)NR⁵R⁶, O(CO)NR⁵R⁶, C₀₋₆alkyl(SO₂)NR⁵R⁶,OC₂₋₆alkyl(SO₂)NR⁵R⁶, C₀₋₆alkylNR⁵(SO₂)R⁶, OC₂₋₆alkylNR⁵(SO₂)R⁶, SO₃R⁵,C₁₋₆alkylNR⁵(SO₂)NR⁵R⁶, OC₂₋₆alkyl(SO₂)R⁵, C₀₋₆alkyl(SO₂)R⁵,C₀₋₆alkyl(SO)R⁵, OC₂₋₆alkyl(SO)R⁵ and a 5- or 6-membered ring containingone or more atoms independently selected from the group consisting of C,N, O and S;R⁵ and R⁶ are independently selected from, H, C₁₋₆alkyl, C₃₋₇cycloalkyland aryland salts and hydrates thereofm is selected from 0, 1, 2, 3 or 4p is selected from 0, 1, 2, 3 or 4or a salt or hydrate thereof.with the proviso that the compound is not:

-   1-[hydroxyl-(2-phenyl-2H-tetrazol-5yl)-methyl]piperidine;-   1-(2-phenyl-2H-tetrazol-5ylmethyl)-pyridine; and-   1-(2-phenyl-2H-tetrazol-5ylmethyl)-piperidine.

This invention relates to tetrazole compounds defined in formula 1.Compounds of formula 1 include those where P is an aryl or heteroarylgroup. Particular embodiments of the invention include those wherein Pis phenyl or pyridyl. P can be substituted with 0-4 substitutents R¹.Preferably there are one or two R¹ substitutents on P. In particular ifthere is one substitutent R¹ it is preferable to have the substitutentat the meta-position of the ring P relative to the attachment point of Pat X³, and if there are two substitutents, at the 2-, and 5-positions ofthe ring P. Embodiments of the invention include those where R¹ is asdefined in formula 1. In particular embodiments R¹ is selected fromhalo, C₁₋₆alkyl, —OC₁₋₆alkyl and C₀₋₆alkylcyano. More particularly R¹ isselected from Cl, F, cyano and methyl.

Formula 1 describes compounds having a 5-membered ring containing 4nitrogen atoms and one carbon (tetrazole). Wherein the carbon can beeither in the X³ position or the X⁴ position. Particular embodiments ofthe invention include compounds where the carbon is in the X⁴ position.

Formula 1 describes variables X¹ and X², which form a linker between the5-membered tetrazole ring and the ring Q. In embodiments of theinvention X¹ is CR³R⁴. In preferred embodiments R³ and R⁴ areindependently selected from H and C₁₋₆alkyl, and more particularly fromH or methyl. In one embodiment of the invention X² is a bond. In anotherembodiment of the invention X² is selected from CR³R⁴, O, S and NR³.When X² is CR³R⁴ or NR³, R³ and R⁴ are as described above.

Q is defined as a ring having 4-, 5-, 6- or 7-members, wherein one ormore of the ring members is a heteroatom selected from N, O and S.Furthermore the ring can be fused to a second ring having 5- or6-members containing one or more heteroatoms to form a fused bicyclicgroup.

In one embodiment of the invention Q is a 5- or 6-member ring and is notfused to a second ring. In a more particular embodiment Q is a 5- or6-membered heterocycloalkyl ring. Even more particularly Q is a6-membered ring and more particularly a piperazine ring.

In another embodiment of the invention Q is a 5- or 6-memberedheteroaromatic ring. In a more particular embodiment, Q is a 5-memberedheteroaromatic ring, even more particularly Q is a triazole ring.

In yet another embodiment of the invention Q is 5-, 6- or 7-memberedring and is fused to a 5- or 6-membered ring. In a particular embodimentQ is a 5-, 6-, or 7-membered heterocyclic ring and is fused to a 5- or6-membered heteroaryl ring. In a preferred embodiment Q is a 5-, 6-, or7-membered heterocyclic ring fused to a triazole ring. In particularembodiments of the invention the fused bicyclic ring system formed isselected from tetrahydrotriazolopyridyl, tetrahydrotriazolopyrimidinyl,dihyrotriazolothiazine, tetrahydrotriazolopyrazine,tetrahydrotetraaza-azulene, dihydropyrollotriazol.

In a further embodiment of the invention when Q is a fused to a secondring as described above, X² is a bond and X¹ is CR³R⁴.

In still another embodiment when Q is a triazole that is not fused X¹ isCR³R⁴ and X² is CR³R⁴, O, S and NR⁵, and when Q is piperazine, X¹ isCR³R⁴ and X² and is a bond.

In another aspect of the invention the ring Q (either or both of the 4,5, 6, or 7-membered ring and the fused 5, 6, or 7-memebered ring) may befurther substituted with 0 to 4 substitutents R².

In one embodiment R² is selected from C₁₋₆alkyl, C₁₋₆alkylhalo,C₃₋₇cylcoalkyl, C₀₋₆alkylaryl, C₀₋₆alkylheteroaryl, (CO)OC₁₋₄alkyl.

In a particular embodiment when Q is piperazine R² is (CO)OC₁₋₄alkyl. Inanother particular embodiment when Q is triazole R² is C₁₋₆alkyl,C₃₋₇cycloalkyl, C₀₋₆alkylaryl, C₀₋₆alkylheteroaryl. In a furtherembodiment there may be two substitutents R² wherein one is selectedfrom C₀₋₆alkylaryl, C₀₋₆alkylheteroaryl and the second is selected fromC₁₋₆alkyl, C₃₋₇cylcoalkyl. More particularly one substitutent may beselected from phenyl and pyridyl and the second may be selected frommethyl or cyclopropyl.

In still another particular embodiment, when Q has a fused second ring,the second ring is substituted with R² selected from C₀₋₆alkylaryl,C₀₋₆alkylheteroaryl. More specifically when the fused ring is triazolethe triazole ring is substituted with phenyl or pyridyl.

In another embodiment of the invention when R² is a 5- or 6-memberedring, R² may be substituted with one or more substitutents A.Furthermore, any C₁₋₆alkyl, aryl or heteroaryl defined under R¹, R² andR³ can be further substituted with one or more groups A.

In a particular embodiment of the invention A is selected from halo,C₁₋₆alkyl, —OC₁₋₆alkyl and C₀₋₆alkylcyano.

The invention is also related to the following compounds;

-   Ethyl    4-{[2-(3-chlorophenyl)-2H-tetrazol-5-yl]methyl}piperazine-1-carboxylate-   4-[2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-ylmethyl]-piperazine-1-carboxylic    acid ethyl ester-   4-(2-m-Tolyl-2H-tetrazol-5-ylmethyl)-piperazine-1-carboxylic acid    ethyl ester-   4-[2-(3-Iodo-phenyl)-2H-tetrazol-5-ylmethyl]-piperazine-1-carboxylic    acid ethyl ester-   4-[2-(3-Cyano-phenyl)-2H-tetrazol-5-ylmethyl]-piperazine-1-carboxylic    acid ethyl ester-   4-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-ylmethyl]-piperazine-1-carboxylic    acid ethyl ester-   4-[5-({[2-(3-chlorophenyl)-2H-tetrazol-5-yl]methyl}thio)-4-cyclopropyl-4H-1,2,4-triazol-3-yl]pyridine-   4-[5-({1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}thio)-4-cyclopropyl-4H-1,2,4-triazol-3-yl]pyridine-   Ethyl    4-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazine-1-carboxylate-   4-{5-[2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-ylmethylsulfanyl]-4-methyl-4H-[1,2,4]triazol-3-yl}-pyridine-   4-{5-[2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-ylmethylsulfanyl]-4-cyclopropyl-4H-[1,2,4]triazol-3-yl}-pyridine-   4-(5-{1-[2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-yl]-ethylsulfanyl}-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine-   4-(5-{1-[2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-yl]-ethylsulfanyl}-4-cyclopropyl-4H-[1,2,4]triazol-3-yl)-pyridine-   4-{1-[2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-yl]-ethyl}-piperazine-1-carboxylic    acid ethyl ester-   4-[4-Cyclopropyl-5-(2-m-tolyl-2H-tetrazol-5-ylmethylsulfanyl)-4H-[1,2,4]triazol-3-yl]-pyridine-   4-{4-Cyclopropyl-5-[1-(2-m-tolyl-2H-tetrazol-5-yl)-ethylsulfanyl]-4H-[1,2,4]triazol-3-yl}-pyridine-   4-f{4-Methyl-5-[1-(2-m-tolyl-2H-tetrazol-5-yl)-ethylsulfanyl]-4H-[1,2,4]triazol-3-yl}-pyridine-   3-[5-(4-Cyclopropyl-5-pyridin-4-yl-4H-[1,2,4]thiazol-3-ylsulfanylmethyl)-tetrazol-2-yl]-benzonitrile-   3-{5-[1-(4-Cyclopropyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-ylsulfanyl)-ethyl]-tetrazol-2-yl}-benzonitrile-   3-{5-[1-(4-Methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-ylsulfanyl)-ethyl]-tetrazol-2-yl}-benzonitrile-4-{4-Cyclopropyl-5-[2-(2-fluoro-5-methyl-phenyl)-2H-tetrazol-5-ylmethylsulfanyl]-4H-[1,2,4]triazol-3-yl}-pyridine-   4-(4-Cyclopropyl-5-{1-[2-(2-fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethylsulfanyl}-4H-[1,2,4]triazol-3-yl)-pyridine-   4-(5-{1-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethylsulfanyl}-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine-   Methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-(2-m-tolyl-2H-tetrazol-5-ylmethyl)-amine-   Methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-[1-(2-m-tolyl-2H-tetrazol-5-yl)ethyl]-amine-   [2-(3-Chloro-phenyl)-2H-tetrazol-5-ylmethyl]-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine-   {1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethyl}-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine-   [2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-ylmethyl]-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine-   {1-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethyl}-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine-   [2-(3-Iodo-phenyl)-2H-tetrazol-5-ylmethyl]-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine-   {1-[2-(3-Iodo-phenyl)-2H-tetrazol-5-yl]-ethyl}-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine-   Methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-(2-m-tolyl-2H-tetrazol-5-ylmethyl)-amine-   Methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-[1-(2-m-tolyl-2H-tetrazol-5-yl)ethyl]-amine-   [2-(3-Chloro-phenyl)-2H-tetrazol-5-ylmethyl]-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine-   {1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethyl}-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine-   [2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-ylmethyl]-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine-   {1-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethyl}-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine-   8-[2-(3-Iodo-phenyl)-2H-tetrazol-5-ylmethyl]-3-pyridin-4-yl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine-   is    8-{1-[2-(3-Iodo-phenyl)-2H-tetrazol-5-yl]-ethyl}-3-pyridin-4-yl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine-   3-Pyridin-4-yl-8-(2-m-tolyl-2H-tetrazol-5-ylmethyl)-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene-   3-Pyridin-4-yl-8-[1-(2-m-tolyl-2H-tetrazol-5-yl)-ethyl]-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene-   8-[2-(3-Chloro-phenyl)-2H-tetrazol-5-ylmethyl]-3-pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,    2,3a,8-tetraaza-azulene-   8-{1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethyl}-3-pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene-   8-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-ylmethyl]-3-pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene-   8-{1-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethyl}-3-pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene-   8-[2-(3-Iodo-phenyl)-2H-tetrazol-5-ylmethyl]-3-pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene-   8-{1-[2-(3-Iodo-phenyl)-2H-tetrazol-5-yl]-ethyl}-3-pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene-   4-(5-{[2-(3-chlorophenyl)-2H-tetrazol-5-yl]methoxy}-4-methyl-4H-1,2,4-triazol-3-yl)pyridine-   4-(5-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethoxy}-4-methyl-4H-1,2,4-triazol-3-yl)pyridine-   4-[4-Methyl-5-(2-m-tolyl-2H-tetrazol-5-ylmethoxy)-4H-[1,2,4]triazol-3-yl]-pyridine-   4-{4-Methyl-5-[1-(2-m-tolyl-2H-tetrazol-5-yl)-ethoxy]-4H-[1,2,4]triazol-3-yl}-pyridine-   4-{5-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-ylmethoxy]-4-methyl-4H-[1,2,4]triazol-3-yl}-pyridine-   4-(5-{1′-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine-   4-{5-[2-(3-Chloro-phenyl)-2H-tetrazol-5-ylmethoxy]-4-cyclopropyl-4H-[1,2,4]triazol-3-yl}-pyridine-   4-(5-{1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4-cyclopropyl-4H-[1,2,4]triazol-3-yl)-pyridine-   4-[4-Cyclopropyl-5-(2-m-tolyl-2H-tetrazol-5-ylmethoxy)-4H-[1,2,4]triazol-3-yl]-pyridine-   4-{4-Cyclopropyl-5-[1-(2-m-tolyl-2H-tetrazol-5-yl)-ethoxy]-4H-[1,2,4]triazol-3-yl}-pyridine-   4-{4-Cyclopropyl-5-[2-(2-fluoro-5-methyl-phenyl)-2H-tetrazol-5-ylmethoxy]-4H-[1,2,4]triazol-3-yl}-pyridine-   4-(4-Cyclopropyl-5-{1-[2-(2-fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4H-[1,2,4]triazol-3-yl)-pyridine-   4-{5-[2-(3-Iodo-phenyl)-2H-tetrazol-5-ylmethoxy]-4-methyl-4H-[1,2,4]triazol-3-yl}-pyridine-   4-(5-{1-[2-(3-Iodo-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4-methyl-4H-[1,2,4]triazol-3-yl)pyridine-   4-{4-Cyclopropyl-5-[2-(3-iodo-phenyl)-2H-tetrazol-5-ylmethoxy]-4H-[1,2,4]triazol-3-yl}-pyridine-   4-(4-Cyclopropyl-5-{1-[2-(3-iodo-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4H-[1,2,4]triazol-3-yl)-pyridine-   3-[5-(4-Methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yloxymethyl)-tetrazol-2-yl]-benzonitrile-   3-{5-[1-(4-Methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yloxy)-ethyl]-tetrazol-2-yl}-benzonitrile-   3-[5-(4-Cyclopropyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yloxymethyl)-tetrazol-2-yl]-benzonitrile-   3-{5-[1-(4-Cyclopropyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yloxy)-ethyl]-tetrazol-2-yl}-benzonitrile-   3-(5-{[Methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amino]-methyl}-tetrazol-2-yl)-benzonitrile-   3-(5-{1-[Methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amino]-ethyl}-tetrazol-2-yl)-benzonitrile-   3-[5-(3-Pyridin-4-yl-6,7-dihydro-5H-[1,2,4]triazolo[4,3-a]pyrimidin-8-ylmethyl)-tetrazol-2-yl]-benzonitrile-   3-{5-[1-(3-Pyridin-4-yl-6,7-dihydro-5H-[1,2,4]triazolo[4,3-a]pyrimidin-8-yl)-ethyl]-tetrazol-2-yl}-benzonitrile-   3-[5-(3-Pyridin-4-yl-4,5,6,7-tetrahydro-1,2,3a,8-tetraaza-azulen-8-ylmethyl)-tetrazol-2-yl]-benzonitrile-   3-{5-[1-(3-Pyridin-4-yl-4,5,6,7-tetrahydro-1,2,3a,8-tetraaza-azulen-8-yl)-ethyl]-tetrazol-2-yl}-benzonitrile-   (R) &    (S)-4-(5-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethoxy}-4-methyl-4H-1,2,4-triazol-3-yl)pyridine-   2-(3-chloro-phenyl)-5-[(triphenyl-λ⁵-phosphanyl)-methyl]-2H-tetrazole    hydrobromide-   4-(5-{2-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl]-vinyl}-4-ethyl-4H-[1,2,4]triazol-3-yl)pyridine-   4-(5-{2-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl]-vinyl}-4-ethyl-4H-[1,2,4]triazol-3-yl)pyridine-   1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-2-(4-cyclopropyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-ethanol-   2-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-1-(4-cyclopropyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-ethanol-   4-(5-{2-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl]-vinyl}-4-ethyl-4H-[1,2,4]triazol-3-yl)pyridine-   3-[4-Methyl-5-({[2-(3-methylphenyl)-2H-tetrazol-5-yl]methyl}thio)-4H-1,2,4-triazol-3-yl]benzonitrile,-   5-({[5-(3,5-Difluorophenyl)-4-ethyl-4H-1,2,4-triazol-3-yl]thio}methyl)-2-(3-methylphenyl)-2H-tetrazole,-   3-[4-Methyl-5-({1-[2-(3-methylphenyl)-2H-tetrazol-5-yl]ethyl)thio)-4H-1,2,4-triazol-3-yl]benzonitrile,-   5-(1-{[5-(3,5-Difluorophenyl)-4-ethyl-4H-1,2,4-triazol-3-yl]thio}ethyl)-2-(3-methylphenyl)-2H-tetrazole,-   6-(4-{1-[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazin-1-yl)nicotinonitrile,-   3-(4-{1-[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazin-1-yl)pyrazine-2-carbonitrile,-   2-(4-{1-[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazin-1-yl)nicotinonitrile,-   1-{1-[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]ethyl}-4-(3-nitropyridin-2-yl)piperazine,-   8-{1-[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]ethyl}-3-(3,5-difluorophenyl)-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrimidine,-   8-{1-[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]ethyl}-3-(4-methoxyphenyl)-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrimidine,-   3-(2-Chloro-6-methoxypyridin-4-yl)-8-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}-5,6,7,8-Tetrahydro[1,2,4]triazolo[4,3-a]pyrimidine,-   8-{1-[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]ethyl}-3-(2-methoxypyridin-4-yl)-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrimidine,-   8-{[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]methyl}-3-(2-methoxypyridin-4-yl)-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrimidine,-   3-(5-{[3-(2-Methoxypyridin-4-yl)-6,7-dihydro[1,2,4]triazolo[4,3-a]pyrimidine-8(5H)-yl]methyl}-2H-tetrazol-2-yl)benzonitrile,-   3-(2-Methoxypyridin-4-yl)-8-{1    [2-(3-iodophenyl)-2H-tetrazol-5-yl]ethyl}-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrimidine,-   3-(5-{1-[3-(2-Methoxypyridin-4-yl)-6,7-dihydro[1,2,4]triazolo[4,3-a]pyrimidin-8(5H)-yl]ethyl}-2H-tetrazol-2-yl)benzonitrile,-   3-(5-{[3-(2-Methoxypyridin-4-yl)-5,6,7,8-tetrahydro-9H-[1,2,4]triazolo[4,3-α][1,3]diazepin-9-yl]methyl}-2H-tetrazol-2-yl)benzonitrile,-   3-(5-{[3-(2,6-Dimethoxypyrimidin-4-yl)-6,7-dihydro[1,2,4]triazolo[4,3-α]pyrimidin-8(5H)-yl]methyl}-2H-tetrazol-2-yl)benzonitrile,-   (R)    3-(5-{1-[3-(2-Methoxypyridin-4-yl)-6,7-dihydro[1,2,4]triazolo[4,3-a]pyrimidin-8(5H)-yl]ethyl}-2H-tetrazol-2-yl)benzonitrile,-   (S)    3-(5-{1-[3-(2-Methoxypyridin-4-yl)-6,7-dihydro[1,2,4]triazolo[4,3-a]pyrimidin-8(5H)-yl]ethyl}-2H-tetrazol-2-yl)benzonitrile,-   (R) Ethyl    4-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazine-1-carboxylate,-   (S) Ethyl    4-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazine-1-carboxylate,-   (R) Ethyl    4-{1-[2-(5-chloro-2-fluorophenyl)-2H-tetrazol-5-yl]ethyl}piperazine-1-carboxylate,-   (S) Ethyl    4-{1-[2-(5-chloro-2-fluorophenyl)-2H-tetrazol-5-yl]ethyl}piperazine-1-carboxylate,-   (R)    6-(4-{1-[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazin-1-yl)nicotinonitrile,-   (S)    6-(4-{1-[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazin-1-yl)nicotinonitrile,-   (R)    3-(4-{1-[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazin-1-yl)pyrazine-2-carbonitrile,-   (S)    3-(4-{1-[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazin-1-yl)pyrazine-2-carbonitrile,-   4-(5-{(S)-1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine,-   2-(3-Chloro-phenyl)-5-{(R)-1-[5-(3,5-difluoro-phenyl)-4-methyl-4H-[1,2,4]triazol-3-yloxy]-ethyl}-2H-tetrazole,-   3-(5-{(R)-1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine,-   4-(5-{2-[5-(3-Chlorophenyl)-2H-tetrazol-2-yl]propyl}-4-methyl-4H-1,2,4-triazol-3-yl)pyridine,-   4-(5-{(R)-1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine,-   2-(3-chlorophenyl)-5-[1-methyl-2-phenylvinyl]-2H-tetrazole, and-   2-({1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}thio)-imidazo[4,5-b]pyridine;

Embodiments of the invention include salt forms of compounds offormula 1. Salts for use in pharmaceutical compositions will bepharmaceutically acceptable salts, but other salts may be useful in theproduction of the compounds of formula I.

A suitable pharmaceutically acceptable salt of the compounds of theinvention is, for example, an acid-addition salt, for example aninorganic or organic acid. In addition, a suitable pharmaceuticallyacceptable salt of the compounds of the invention is an alkali metalsalt, an alkaline earth metal salt or a salt with an organic base.

Other pharmaceutically acceptable salts and methods of preparing thesesalts may be found in, for example, Remington's Pharmaceutical Sciences(18^(th) Edition, Mack Publishing Co.) 1990.

Some compounds of formula I may have chiral centres and/or geometricisomeric centres (E- and Z-isomers), and it is to be understood that theinvention encompasses all such optical, diastereoisomeric and geometricisomers.

The invention also relates to any and all tautomeric forms of thecompounds of formula I. The invention also relates to any and allsolvate and hydrate forms of compounds of formula 1.

Pharmaceutical Composition

According to one aspect of the present invention there is provided apharmaceutical composition comprising as active ingredient atherapeutically effective amount of the compound of formula I, or salts,solvates or solvated salts thereof, in association with one or morepharmaceutically acceptable diluent, excipients and/or inert carrier.

The composition may be in a form suitable for oral administration, forexample as a tablet, pill, syrup, powder, granule or capsule, forparenteral injection (including intravenous, subcutaneous,intramuscular, intravascular or infusion) as a sterile solution,suspension or is emulsion, for topical administration e.g. as anointment, patch or cream or for rectal administration e.g. as asuppository.

In general the above compositions may be prepared in a conventionalmanner using one or more conventional excipients, pharmaceuticalacceptable diluents and/or inert carriers.

Suitable daily doses of the compounds of formula I in the treatment of amammal, including man are approximately 0.01 to 250 mg/kg bodyweight atperoral administration and about 0.001 to 250 mg/kg bodyweight atparenteral administration.

The typical daily dose of the active ingredients varies within a widerange and will depend on various factors such as the relevantindication, severity of the illness being treated, the route ofadministration, the age, weight and sex of the patient and theparticular compound being used, and may be determined by a physician.

Medical Use

It has been found that the compounds according to the present invention,or salts, solvates or solvated salts thereof, exhibit a high degree ofpotency and selectivity for individual metabotropic glutamate receptor(mGluR) subtypes. Accordingly, the compounds of the present inventionare expected to be useful in the treatment of conditions associated withexcitatory activation of mGluR5 and for inhibiting neuronal damagecaused by excitatory activation of mGluR5. The compounds may be used toproduce an inhibitory effect of mGluR5 in mammals, including man.

The mGluR Group I receptor including mGluR5 are highly expressed in thecentral and peripheral nervous system and in other tissues. Thus, it isexpected that the compounds of the invention are well suited for thetreatment of mGluR5-mediated disorders such as acute and chronicneurological and psychiatric disorders, gastrointestinal disorders, andchronic and acute pain disorders.

The invention relates to compounds of formula I as defined hereinbefore,for use in therapy.

The invention relates to compounds of formula I as defined hereinbefore,for use in treatment of mGluR5-mediated disorders.

The invention relates to compounds of formula I as defined hereinbefore,for use in treatment of Alzheimer's disease senile dementia,AIDS-induced dementia, Parkinson's disease, amylotropic lateralsclerosis, Huntington's Chorea, migraine, epilepsy, schizophrenia,depression, anxiety, acute anxiety, opthalmological disorders such asretinopathies, diabetic retinopathies, glaucoma, auditory neuropathicdisorders such as tinnitus, chemotherapy induced neuropathies,post-herpetic neuralgia and trigeminal neuralgia, tolerance, dependency,Fragile X, autism, mental retardation, schizophrenia and Down'sSyndrome.

The invention relates to compounds of formula I as defined hereinbefore,for use in treatment of pain related to migraine, inflammatory pain,neuropathic pain disorders such as diabetic neuropathies, arthritis andrheumatoid diseases, low back pain, post-operative pain and painassociated with various conditions including angina, renal or biliarycolic, menstruation, migraine and gout.

The invention relates to compounds of formula I as defined hereinbefore,for use in treatment of stroke, head trauma, anoxic and ischemicinjuries, hypoglycemia, cardiovascular diseases and epilepsy.

The present invention relates also to the use of a compound of formula Ias defined hereinbefore, in the manufacture of a medicament for thetreatment of mGluR Group I receptor-mediated disorders and any disorderlisted above.

One embodiment of the invention relates to the use of a compoundaccording to formula I in the treatment of gastrointestinal disorders.

Another embodiment of the invention relates to the use of a compoundaccording to formula I, for the manufacture of a medicament for theinhibition of transient lower esophageal sphincter relaxations, for thetreatment of GERD, for the prevention of reflux, for the treatmentregurgitation, treatment of asthma, treatment of laryngitis, treatmentof lung disease and for the management of failure to thrive.

A further aspect of the invention is the use of a compound according toformula I for the manufacture of a medicament for the treatment orprevention of functional gastrointestinal disorders, such as functionaldyspepsia (FD). Yet another aspect of the invention is the use of acompound according to formula I for the manufacture of a medicament forthe treatment or prevention of irritable bowel syndrome (IBS), such asconstipation predominant IBS, diarrhea predominant IBS or alternatingbowel movement predominant IBS.

A further aspect of the invention is the use of a compound according toformula I for the manufacture of a medicament for the treatment orprevention of obesity and obesity related conditions, as well astreating eating disorders by inhibition of excessive food intake and theresulting obesity and complications associated therewith.

The invention also provides a method of treatment of mGluR5-mediateddisorders and any disorder listed above, in a patient suffering from, orat risk of, said condition, which comprises administering to the patientan effective amount of a compound of formula I, as hereinbefore defined.

The dose required for the therapeutic or preventive treatment of aparticular disorder will necessarily be varied depending on the hosttreated, the route of administration and the severity of the illnessbeing treated.

In the context of the present specification, the term “therapy” and“treatment” includes prevention or prophylaxis, unless there arespecific indications to the contrary. The terms “therapeutic” and“therapeutically” should be construed accordingly.

In this specification, unless stated otherwise, the term “antagonist”and “inhibitor” shall mean a compound that by any means, partly orcompletely, blocks the transduction pathway leading to the production ofa response by the ligand.

The term “disorder”, unless stated otherwise, means any condition anddisease associated with metabotropic glutamate receptor activity.

Non-Medical Use

In addition to their use in therapeutic medicine, the compounds offormula I, salts, solvates or solvated salts thereof, are also useful aspharmacological tools in the development and standardisation of in vitroand in vivo test systems for the evaluation of the effects of inhibitorsof mGluR related activity in laboratory animals such as cats, dogs,rabbits, monkeys, rats and mice, as part of the search for newtherapeutics agents.

Methods of Preparation

Another aspect of the present invention provides processes for preparingcompounds of formula I, or salts, solvates or solvated salts thereof.Processes for the preparation of the compounds in the present inventionare described herein.

Throughout the following description of such processes it is to beunderstood that, where appropriate, suitable protecting groups will beadded to, and subsequently removed from, the various reactants andintermediates in a manner that will be readily understood by one skilledin the art of organic synthesis. Conventional procedures for using suchprotecting groups as well as examples of suitable protecting groups aredescribed, for example, in “Protective Groups in Organic Synthesis”, T.W. Green, P. G. M. Wuts, Wiley-Interscience, New York, (1999). It isalso to be understood that a transformation of a group or substitutentinto another group or substitutent by chemical manipulation can beconducted on any intermediate or final product on the synthetic pathtoward the final product, in which the possible type of transformationis limited only by inherent incompatibility of other functionalitiescarried by the molecule at that stage to the conditions or reagentsemployed in the transformation. Such inherent incompatibilities, andways to circumvent them by carrying out appropriate transformations andsynthetic steps in a suitable order, will be readily understood to theone skilled in the art of organic synthesis. Examples of transformationsare given below, and it is to be understood that the describedtransformations are not limited only to the generic groups orsubstitutents for which the transformations are exemplified. Referencesand descriptions on other suitable transformations are given in“Comprehensive Organic Transformations—A Guide to Functional GroupPreparations” R. C. Larock, VHC Publishers, Inc. (1989). References anddescriptions of other suitable reactions are described in textbooks oforganic chemistry, for example, “Advanced Organic Chemistry”, March, 4thed. McGraw Hill (1992) or, “Organic Synthesis”, Smith, McGraw Hill,(1994). Techniques for purification of intermediates and final productsinclude for example, straight and reversed phase chromatography oncolumn or rotating plate, recrystallisation, distillation andliquid-liquid or solid-liquid extraction, which will be readilyunderstood by the one skilled in the art. The definitions ofsubstitutents and groups are as in formula I except where defineddifferently. The term “room temperature” and “ambient temperature” shallmean, unless otherwise specified, a temperature between 16 and 25° C.

The term “reflux” shall mean, unless otherwise stated, in reference toan employed solvent using a temperature at or above the boiling point ofnamed solvent.

Methods of Preparation of Compounds of Formula I

The non-limiting synthetic paths given below, are useful for furtherpreparation of intermediates and of compounds of formula I. Otherstarting materials used in the preparation of compounds of Formula I areeither commercially available or can be prepared via methods describedin the literature.

Compounds of formula v are prepared through condensation betweenaldehydes of formula II, for example cinnamaldehyde or glyoxalic acid,with arylsulphonylhydrazines iii, such as 4-toluensulfonylhydrazine, ina suitable solvent, for example methanol, ethanol, DMF or dialkylethers,at a temperature between 0 to 100° C., alternatively without solventunder microwave irradiation. Similarly, arylhydrazones of formula vi maybe formed from the reaction of arylhydrazine iv, with aldehydes offormula ii. [J. Med. Chem. 1980, 23, 631-634; Monatshefte fuer Chemie2001, 403-406; J. Med. Chem. 2000, 43, 953-970; J. Med. Chem. 1978, 21,1254-60]

Diazonium salts of formula viii are available from a suitablysubstituted aryl or heteroaryl amine of formula vii using well knownmethods, via diazotization using a nitrite source such as sodium nitriteor isoamyl nitrite in the presence of a suitable acid source such ashydrochloric acid or tetrafluoroboric acid in a solvent such as water ata temperature between −10 to 0° C. In the case where a less solublecounter ion X⁻ is employed, such as tetrafluoroborate, the diazoniumsalt thus formed may be collected by precipitation and used insubsequent reactions under non-aqueous conditions. Soluble diazoniumsalts formed using other acid sources may be precipitated by theaddition of a suitable reagent such as tetrafluoroboric acid or sodiumtetrafluoroborate [Angew. Chem. Int. Ed. Engl. 2004, 43, 897-900].

Tetrazoles of formula ix wherein G is an electron withdrawing group,such as an olefin, carbonyl or aryl group, may be prepared by1,3-dipolar cycloaddition of a diazonium salt onto an aryl sulfonylhydrazone followed by elimination of the arylsulfinic acid to generatethe tetrazole ring, in protic solvents such as water and alcohol ormixtures thereof, in basic aprotic solvents such as pyridine, ormixtures of these solvents with protic solvents used to generate thediazonium salt. [J. Med. Chem. 2000, 43, 953-970]

Tetrazoles of formula ix may also be prepared from the reaction of anarylhydrazone of formula vi with an aryl azide of formula xi, in asuitable solvent such as ethanol or pyridine. [J. Med. Chem. 1978, 21,1254-60] Aryl azides of formula xi may be formed using sodium azide withan aryl diazonium salt of formula x, which may in turn be prepared asdescribed above from an aryl amine, for example aniline or2,4,6-tribromoaniline. The aryl azide may be considered as a nitrogentransfer reagent since cycloaddition onto the hydrazone is followed byelimination to regenerate the aryl amine precursor to diazonium salt x.

Typically, G is a group which may be employed as a precursor to theX¹—X²-Q(R²)_(p) moiety in compounds of formula I, such as an olefin orcarboxylic acid or acid derivative. When G is an aryl olefinic compoundof formula xii, derived for example from cinnamaldehyde where R³ is H,the olefin group can be cleaved to provide an aldehyde of formula xiiidirectly in a one-pot process using a reagent such as ozone or via thediol using a dihydroxylation reagent such as osmium tetroxide followedby subsequent cleavage using a reagent such as lead (IV) acetate. When asubstituted cinnamaldehyde is employed the reaction to produce compoundsof formula xii, such as α-methylcinnamaldehyde wherein R³ is methyl, aketone would result from the cleavage of the olefin. [J. Med. Chem.2000, 43, 953-970; Adv. Synth. Catal. 2002, 344, 421-433; “Oxidations inOrganic Chemistry”, M. Hudlicky, ACS Monograph 186, (1990)]

Aldehydes of formula xiii wherein R³ is H may be reduced to primaryalcohols of formula xv wherein R³ and R⁴ are H, using well knownreducing agents such as sodium or lithium borohydride, in a solvent suchas methanol, THF or DMF at temperatures between 0-80° C. Secondaryalcohols wherein R⁴ is not H may also be formed from aldehydes offormula xiii via addition reactions of an organometallic reagent, forexample Grignard reagents R⁴MgX, in a solvent such as THF attemperatures between −78° C. to 80° C., and are typically performedbetween 0° C. and room temperature. Similarly, ketones of formula xiii,wherein R³ is not H, may be employed to form secondary or tertiaryalcohols of formula xv by reduction or addition of an organometallicreagent. Primary alcohols of formula xv, wherein R³ and R⁴ are H, arealso available from compounds of formula xiv, by reduction of acid orester derivative using reducing agents such as lithium borohydride in asuitable solvent such as THF or DMF at temperatures in the range of20-80° C. Ketones of formula xiii are obtained by treatment ofcarboxylic acid esters with the appropriate carbon nucleophile, such asGrignard reagents R³MgX according to standard protocols. [J. Med. Chem.1978, 21, 1254-60; J. Med. Chem. 1993, 36, 2676-2688; Can. J. Chem.1995, 73, 885-895]

Enantiomerically pure or enriched products, as depicted in scheme 4a (R⁷is Me or Et; X³ and X⁴ as defined in formula I) are obtained by kineticresolution of racemic or scalemic secondary alcohols usingenzyme-catalyzed acetylation with for example polymer bound CandidaAntarctica Lipase (Novozyme 435®), or other esterases, for exampleCandida rugosa or Pseudomonas fluorescens, in organic solvents such astoluene, tert-butyl methyl ether, tert-butanol or DCM at temperaturesfrom 0 to 90° C., using acetylating reagents such as vinyl acetate,other substituted alkyl acetates, pentafluorophenyl acetate or nitro- orhalophenyl acetates, which yields the enriched (R)-acetate and theenriched (S)-alcohol.

The (R)-acetate may be hydrolyzed to the corresponding alcohol by e.g.lithium hydroxide in mixtures of THF and water or by any other methodsas described herein below, to yield the opposite enantiomericallyenriched or pure alcohol.

Alcohols of formula xv may be converted by standard methods to compoundsof formula xvi wherein LG is a leaving group. Compounds of formula xviwherein LG is a halide are formed by the use of reagents such astriphenylphosphine in combination with a halide source such as iodine,N-bromosuccinimide or N-chlorosuccinimide, or alternatively by treatmentwith tribromophosphine or thionyl chloride. The alcohol moiety incompounds of formula xv may also be transformed to leaving groups LGsuch as mesylates or tosylates by employing the appropriate sulfonylhalide or sulfonyl anhydride in the presence of a non-nucleophilic baseto obtain the corresponding sulfonates. Chlorides or sulfonates can beconverted to the corresponding bromides or iodides by treatment withbromide salts, for example LiBr, or iodide salts, such as LiI.

Amine intermediates of formula xvii may be formed using compounds offormula xvi wherein LG represents a leaving group, by displacement ofsaid leaving group using a primary amine, NH₂R³ or source of ammoniawhen R³ is H, or may be formed using the corresponding carbonylcompounds of formula xiii via reductive amination using an amine, NH₂R³,in the presence of a suitably mild reducing agent such as NaBH₃CN orNaBH(OAc)₃ in a suitable solvent such as THF, methanol or1,2-dichloroethane.

Compounds of formula xxiii containing thedihydro[1,2,4]triazole-3-thione ring may be prepared by initialN-acylation of a 4-alkylthiosemicarbazide of formula xix, using anysuitable acylating agent of formula xviii in a suitable solvent, forexample pyridine DMF, DCM, THF, or acetonitrile at a temperature from−20 to 100° C. A pre-formed acylating agent such as an acid halide maybe employed, or an acid may be activated in situ by the treatment withstandard activating reagents such as DCC, DIC, EDCl or HBTU, with orwithout the presence of co-reagents such as HOBt or DMAP. Formation ofthe acyclic intermediate xxii is followed by alkaline ring closureeither spontaneously under the conditions of the acylation, or byheating at 50 to 150° C. in pyridine or in aqueous solvents in thepresence of a base, such as NaOH, NaHCO₃ or Na₂CO₃, with or withoutco-solvents such as dioxane, THF, MeOH, EtOH or DMF. The acyclicintermediate of formula xxii can also be formed by treatment of an acylhydrazide of formula xx with a suitable isothiocyanate of formula xxi ina suitable solvent, for example 2-propanol, DCM, THF or the like attemperatures in the range of −20 to 120° C.

Compounds of formula xxiii may be converted to compounds of formula xxvby initial alkylation of the sulphur atom to form intermediates offormula xxiv using primary alkyl halides such as MeI and EtI (alkyl isMe and Et respectively) in MeOH, EtOH, THF, acetone or the like at −30to 100° C., followed by oxidation of intermediates xxiv using forexample KMnO₄ in mixtures of water and acetic acid, or MCPBA in DCM, at−20 to 120° C., or by using any other suitable oxidant.

3-Amino[1,2,4]triazole compounds of formula xxix, wherein the R^(x′) andR^(x) groups are equivalent to R² and R³ in compounds of formula Iwherein Q is a monocyclic triazole ring or may together form a ringleading to compounds of formula I wherein the Q group is a bicyclicsystem containing a fused triazolo ring, may be obtained by treatingisothioureas of formula xxvi with either an acyl hydrazide of formulaxxvii or in a stepwise manner by treatment with hydrazine followed by anacylating agent of formula xviii. The intermediates of formula xxviiimay form a triazole ring by heating at 50 to 200° C. in a suitablesolvent such as pyridine or DMF. Due to the possibility for cyclizationof both

NHR^(x) groups in compounds of formula xxviii, this reaction works bestwhen symmetrical thioureas are used to avoid a mixture of isomers thatmay occur when the R^(x) groups are not identical. When unsymmetricalthioureas are used, the isomers may be separated by chromatographicpurification.

The reaction of isothioureas of formula xxvi, in which the S-alkyl (forexample S-Me or S-Et) moiety acts as a leaving group upon treatment withhydrazine or acyl hydrazide nucleophile, may be carried out in solventssuch as pyridine, methanol, ethanol, 2-propanol, THF or the like attemperatures between −20 to 180° C. In the two-step process, theacylation may be carried out in suitable solvent such as THF, pyridineor DMF at −20 to 100° C. As described above, the leaving group LG inacylating agent xviii may include chloro or any other suitable leavinggroup such as that generated by in situ treatment of the correspondingacid with standard activating reagents. Isothioureas of formula xxvi maybe obtained by S-alkylation of the corresponding thioureas with an alkylhalide, for example MeI or EtI, in a suitable solvent such as acetone,EtOH, THF, DCM or the like at temperatures between −100 to 100° C.

Carbon-substituted triazoles of formula xxxiii may be prepared in asimilar manner by employing an amide of formula xxx. The amide group maybe activated using a reagent such as POCl₃ or Me₃OBF₄ to generatecompounds of formula xxxi such as chloroimidates (LG=Cl) ormethoxyimidates (LG=OMe). Similar to isothioureas of formula xxvi above,compounds of formula xxxi may react with an acyl hydrazide or hydrazinefollowed by an acylating agent to generate intermediate xxxii, which maybe closed to the triazole spontaneously or by heating. Fused[1,2,4]thiazoles wherein the R^(x) and R^(x′) groups together form a 5-7membered ring may be obtained by employing a suitable cyclic lactaminstead of an acyclic amide. Such lactam imidates are available fromtheir corresponding lactams by treatment with Me₃OBF₄ ordimethylsulfate. [Org. Prep. Proced. Int; 24, 1992, pp. 147-158 orTetrahedron Lett. 42, 2001, pp. 173-1776]

Compounds of formula xxiii may be converted to compounds of formulaxxxiv by reduction of the thione moiety using a suitable reducing agentsuch as Raney Nickel, in a suitable solvent such as ethanol at atemperature between 50 to 100° C., and are typically carried out at 65°C. Compounds of formula xxxv are available from compounds of formulaxxxiv by treatment with an aldehyde, for example formaldehyde, in asuitable solvent such as water at a temperature between room temperatureto 100° C., and are typically carried out at 37° C. when aqueousformalin is used as the source of formaldehyde. The resulting alcoholsof formula xxxv may be oxidized to provide aldehydes or ketones offormula xxxvi using oxidation procedures well known to the one skilledin the art, such as the employment of MnO₂ as oxidant, or by Swernoxidation. Alternatively, compounds of formula xxxvii wherein leavinggroup such as a halide may be prepared from compounds of formula xxxv asdescribed above for alcohols of formula xv.

Examples of compounds of formula I wherein Q is comprised of amonocyclic group include bis amines such as piperazine andhomopiperazine, that are connected to X¹ or X² by one N atom in the ringQ. Bis amines such as N-mono-substituted piperazines or piperazineswhich contain the R² moiety may be commercially available or may beprepared using methods known to one skilled in the art. Such compoundsthat are not available commercially may be prepared from amino acids viaintermediates such as diketopiperazines, which may be reduced to aminessuch as piperazines. In certain reactions known to one skilled in theart, protection of the bis amine of Q is not required and the free aminocompound may be used directly, for example in the displacement of theleaving group in compounds of formula xvi. In such cases, or in caseswhen the protecting group is removed, the free amine may be used tointroduce the R² substitutent in compounds of formula xxxviii, sincesuch amines may be employed as nucleophiles in reactions with many typesof electrophiles, such as alkyl halides, acid chlorides or anhydrides,chloroformates, carbamoyl chlorides, sulfonyl chlorides, isocyanates,isothiocyanates and the like. Compounds of formula xxxviii may also beobtained from carbonyl compounds of formula xiii using reductiveamination conditions as described above for formation of compounds offormula xvii.

When Q in formula I is a cyclic diamine such as piperazine and R3 isaryl or heteroaryl, the required nucleophilic reagents (W═H orprotecting group) may be prepared by coupling to an aryl halide with thecyclic diamine nucleophile, as shown in Scheme 12a. When the aryl groupcontains an activating group such as the presence of an adjacent N suchas in 2-pyridine (X═N, other=CR), 2-pyrimidine (X═X⁵═N or X═X³═N) or2-pyrazine (X═X⁴═N), the reaction is facilitated and may occur underheating without additional catalyst. In the presence of additionalactivating electron withdrawing groups such as ortho or para NO₂ or CN,the reaction may occur at a lower temperature. Aromatic nucleophilicdisplacement with less reactive phenyl halides may be accomplished byaddition of a suitable catalyst/ligand system {Urgaonkar, S.; Xu, J.-H.;Verkade, J. G. J. Org. Chem. 2003, 68, 8416; Urgaonkar, S.; Nagarajan,N.; Verkade, J. G. Org. Lett. 2003, 5, 815).

The Q ring may be constructed from compounds of formula xvii containinga primary amine moiety via any compatible method. One such methodwherein the Q ring is a monocyclic bis amine such as piperazine involvesring construction by displacement of two leaving groups from a compoundsuch as that shown in formula xxxix [Bioorg. Med. Chem. Lett. 2002, 12,791-794; Bioorg. Med. Chem. Lett. 2002, 12, 3195-3198; Synthesis 1990,10, 925-930; J. Org. Chem. 1990, 55, 1684-1687].

Compounds of formula xvii containing a secondary amine are ideallysuited for construction of 3-amino-[1,2,4]triazoles asymmetricallysubstituted on the 3-amino substitutent and the 4-N of the triazolering. Amines of formula xvii may be converted to a wide variety ofthioureas of formula xxxxi by reaction with a suitable isothiocyanate ina suitable solvent such as methanol, ethanol and the like, at atemperature between room temperature and 100° C., and are typicallycarried out at 60° C. Thioureas of formula xxxxi may be converted tocompounds of formula xxxxii by conversion to an isothiourea, followed byreaction with an acyl hydrazine and cyclization to the amino triazole aswas described above for xxix. In this case since the required(R¹)_(m)—P—CR³R⁴ group from formula I is already contained in the amineand the amine is secondary, the triazole cyclization has only one optionto react through the NHR² moiety forming compounds of formula xxxxii andnot the isomeric triazole.

Compounds of formula xxxxii (wherein X² as drawn in formula I is NR³)may also be prepared by displacement of the leaving group from compoundsof formula xvi using a suitable 3-amino[1,2,4]triazole of formula xxix,including those monocyclic triazoles wherein R^(x) groups become R³ andR² and those fused triazoles wherein both R^(x) groups together form aring, with a strong base such as sodium hydride, in a solvent such asDMF at temperatures between room temperature to 100° C., and aretypically performed between 60-80° C.

Similarly, compounds of formula xxxxiii (wherein X² as drawn in formulaI is S) may also be prepared by displacement of the leaving group incompounds of formula xvi using a suitable nucleophile such as thedihydro-[1,2,4]triazole-3-thiones which react through their tautomeric[1,2,4]triazole-3-thiol form in the presence of a base such as potassiumcarbonate or triethylamine, in a suitable solvent such as acetonitrileor DMF, at temperatures between room temperature to 100° C., and aretypically performed at room temperature.

Compounds of formulae xxxxv and xxxxvi (wherein X² as drawn in formula Iis CR³R⁴) may also be prepared by displacement of the leaving group incompounds of formula xvi or addition to the carbonyl moiety in compoundsof formula xiii using a suitable carbon nucleophile such as contained ina compound of formula xxxxiv, M-CR³R⁴-Q-(R₂)_(p) wherein M is a metalcontaining species such as Li or MgBr. Such a carbanion may be generatedby deprotonation when Q is able to stabilize said carbanion, such aswhen Q is an aromatic heterocycle such as triazole, using a strongerbase, such as n-butyllithium or tert-butyllithium, or from a insertionof a metal into a carbon-halogen bond such as occurs when a Grignardreagent is created from a compound of formula xvi (LG=Br). Carbanionsmay be generated and used in ethereal solvents such as THF and diethylether alone or as mixtures with alkanes such as pentane or hexane, attemperatures ranging from −78° C. to 80° C., and are typically initiatedat −78° C. and gradually allowed to warm to room temperature afteraddition of the compound of formula xvi. The reaction of a carbanionwith a benzylic mesylate or halide leaving group may be facilitated byaddition of a copper salt to generate an organocuprate, whereas aGrignard reagent favors 1,2-addition to a carbonyl even when otheroptions are possible. Similarly alcohols of formula xxxxix may beprepared by the addition of a Grignard reagent of formula xxxxvii,available from compounds of formula xvi (LG=Br), to a carbonyl compoundof formula xxxxviii, which for example is equivalent to compounds offormula xxxvi when Q is a triazole.

Compounds of formula 1 wherein X¹ is a C₂-alkenyl and X² is a bond, maybe prepared from Wittig reagents generated by treatment of compounds offormula xvi (LG=Br) with a phosphorus reagent such as PPh₃ in a solventsuch as toluene at a temperature between 50 to 100° C., typically at 80°C., followed by treatment of the resulting phosphonium bromide salt witha carbonyl compound of formula xxxxviii, for example when Q is triazolea compound of formula xxxvi, in the presence of a base such as DBU, in asolvent such as DMF at a temperature between 50 to 100° C., typically at80° C. similarly to the above reactions of Grignard and aldehyde toproduce xxxxvi and xxxxix, the partners may be reversed, resulting inthis case the same compound 1 due to the symmetry of the bond formingreaction.

Olefinic compounds of formula 1 may be reduced by employing hydrogen inthe presence of a metal catalyst such as palladium on carbon in asuitable solvent such as ethyl acetate or ethanol. Alternatively, sucholefinic compounds may be reduced by the addition of a suitable reagent,such as dialkylboranes R₂BH or trialkylsilylane R₃SiH, to the olefin,followed by reductive cleavage of the newly formed bonds. Suchintermediates may also be employed in other reactions such as oxidationto generate alcohols of formula xxxxvi or xxxxix.

Analogous compounds of formula lii and liii may also be available byreduction of the alcohol moiety in compounds of formula xxxxvi andxxxxix using a suitable reducing agent, for example a trialkyl- ortriaryl-silane in the presence of an acid such as trifluoroacetic acid,either neat or in a suitable solvent such as dichloromethane or benzeneat a temperature between room temperature and 80° C., preferably at 40°C.

Compounds of formula liv (wherein X² is O as drawn in formula I andR3=Me or Et and R4=H) may be prepared by bond formation throughnucleophilic replacement of a leaving group such as alk-SO₂ fromcompounds of formula xxv wherein Q is triazole, by an alcohol oralkoxide nucleophile under basic conditions. The base used may includestrong hydridic bases, for example, NaH or milder bases, such as Cs₂CO₃,at temperatures from 0 to 80° C. in polar aprotic solvents such as DMFor acetonitrile, whereas for enantiomerically enriched or pure compoundxv (R4=H) the preferred base is Cs₂CO₃ in order to obtainenantiomerically pure products liv directly. Other suitable leavinggroups may include halogens, such as chloro or bromo.

Compounds of formula lviii wherein the tetrazole ring is reversedcompared to all previous compounds described and X¹ and X² are bothCR³R⁴, may be prepared by nucleophilic reactions of a suitablysubstituted aryl tetrazole of formula lv with a suitable electrophilicreagent of formula lvi. When such an intermediate is available, it maybe employed directly in the reaction with the aryl tetrazole of formula1v, producing compounds of formula 1vii directly. [J. Med. Chem. 1967,10, 400-402, Pharm. Chem. J. (English Translation) 1993, 27, 204-209].When such an intermediate is not available, other electrophilic reagentswherein G is a group which may later be converted to the Q-(R²)_(p)moiety may be employed leading to intermediates of formula 1vi. [J. Med.Chem. 1995, 38, 4786-4792; J. Med. Chem. 1992, 35, 1191-1200; J. Med.Chem. 1992; 35, 1200-1209] For example, an aryl tetrazole of formula 1vmay add in the 1,4- or Michael sense to an olefinic compound conjugatedto an electron withdrawing G group for example, nitrile, aldehyde, esterand the like, yielding a compound of formula lvii, wherein some of theR³ and R⁴ substitutents may be H due to the valency requirements of theolefin or the reactivity of said electrophilic olefinic. Severalnon-limiting examples of electrophiles are listed in the scheme belowcontaining a true leaving group LG such as a mesylate or halide. In suchcases, G may also be a —CH₂OPG group (or an equivalent thereof).Alternatively, an internal leaving group X such as an epoxide oractivated aziridine wherein the X group is retained in the compound offormula lvii may be employed. When Q contains a triazole ring, methodsthat have been described for preceding examples may be employed.

It is to be understood by one skilled in the art that when incompatiblefunctional groups are present, such groups may be suitably protected toallow the reaction to proceed. It is also to be understood that productsof formula I can also be converted to other products of formula I whensuitable functional groups are present. Several non-limiting examplesare listed here. When X2 is S, the sulfide of formula I may be oxidizedto the sulfoxide and sulfone. When an aryl halide such as iodide orbromide is present, transition metal catalysts such as palladium (0)tetrakis triphenylphosphine may effect transformation of such aryliodides and bromides to groups such as cyano, alkenyl and aryl orheteroaryl in the presence of suitable coupling agents. When a suitablealcohol or secondary or primary amine is present in formula I, suchgroups may be alkylated or acylated.

The invention further relates to the following compounds, which may beused as intermediates in the preparation of the compound of formula I;

Cinnamaldehyde tosyl hydrazone

-   2-(3-Chloro-phenyl)-5-styryl-2H-tetrazole-   2-(5-Chloro-2-fluoro-phenyl)-5-styryl-2H-tetrazole-   5-Styryl-2-m-tolyl-2H-tetrazole-   2-(3-Iodo-phenyl)-5-styryl-2H-tetrazole-   3-(5-Styryl-tetrazol-2-yl)-benzonitrile-   2-(2-Fluoro-5-methyl-phenyl)-5-styryl-2H-tetrazole-   1-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl]-2-phenyl-ethane-1,2-diol-   1-[2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-yl]-2-phenyl-ethane-1,2-diol-   1-Phenyl-2-(2-m-tolyl-2H-tetrazol-5-yl)-ethane-1,2-diol-   1-[2-(3-Iodo-phenyl)-2H-tetrazol-5-yl]-2-phenyl-ethane-1,2-diol-   3-[5-(1,2-Dihydroxy-2-phenyl-ethyl)-tetrazol-2-yl]-benzonitrile-   1-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-2-phenyl-ethane-1,2-diol-   2-(3-Chloro-phenyl)-2H-tetrazole-5-carbaldehyde-   2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazole-5-carbaldehyde-   2-m-Tolyl-2H-tetrazole-5-carbaldehyde-   2-(3-Iodo-phenyl)-2H-tetrazole-5-carbaldehyde-   3-(5-Formyl-tetrazol-2-yl)-benzonitrile-   2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazole-5-carbaldehyde-   [2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-methanol-   [2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-yl]-methanol-   (2-m-Tolyl-2H-tetrazol-5-yl)-methanol-   [2-(3-Iodo-phenyl)-2H-tetrazol-5-yl]-methanol-   3-(5-Hydroxymethyl-tetrazol-2-yl)-benzonitrile-   [2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-methanol-   1-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl-ethanol-   1-[2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-yl]-ethanol-   1-(2-m-Tolyl-2H-tetrazol-5-yl)-ethanol-   1-[2-(3-Iodo-phenyl)-2H-tetrazol-5-yl]-ethanol-   3-[5-(1-Hydroxy-ethyl)-tetrazol-2-yl]-benzonitrile-   1-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethanol-   5-Bromomethyl-2-(3-chloro-phenyl)-2H-tetrazole-   Methanesulfonic acid 1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]-ethyl    ester-   Methanesulfonic acid    2-(5-chloro-2-fluoro-phenyl)-2H-tetrazol-5-ylmethyl ester-   Methanesulfonic acid    1-[2-(5-chloro-2-fluoro-phenyl)-2H-tetrazol-5-yl]-ethyl ester-   Methanesulfonic acid 2-m-tolyl-2H-tetrazol-5-ylmethyl ester-   Methanesulfonic acid 1-(2-m-tolyl-2H-tetrazol-5-yl)-ethyl ester-   Methanesulfonic acid 2-(3-cyano-phenyl)-2H-tetrazol-5-ylmethyl ester-   Methanesulfonic acid 1-[2-(3-cyano-phenyl)-2H-tetrazol-5-yl]-ethyl    ester-   Methanesulfonic acid    2-(2-fluoro-5-methyl-phenyl)-2H-tetrazol-5-ylmethyl ester-   Methanesulfonic acid    1-[2-(2-fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethyl ester-   Methanesulfonic acid 2-(3-iodo-phenyl)-2H-tetrazol-5-ylmethyl ester-   Methanesulfonic acid 1-[2-(3-iodo-phenyl)-2H-tetrazol-5-yl]-ethyl    ester-   4-Methyl-5-pyridin-4-yl-2,4-dihydro-[1,2,4]triazole-3-thione-   4-Ethyl-5-pyridin-4-yl-2,4-dihydro-[1,2,4]triazole-3-thione-   4-Cyclopropyl-5-pyridin-4-yl-2,4-dihydro-[1,2,4]triazole-3-thione-   4-(4-Methyl-5-methylsulfanyl-4H-[1,2,4]triazol-3-yl)-pyridine-   4-(4-Cyclopropyl-5-methylsulfanyl-4H-[1,2,4]triazol-3-yl)-pyridine-   4-(5-Methanesulfonyl-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine-   4-(4-Cyclopropyl-5-methanesulfonyl-4H-[1,2,4]triazol-3-yl)-pyridine-   Methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine-   3-Pyridin-4-yl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine-   2-(methylthio)-4,5,6,7-tetrahydro-1H-1,3-diazepine-   1,3-diazepan-2-onehydrazonehydroiodide-   3-pyridin-4-yl-6,7,8,9-tetrahydro-5H-[1,2,4]triazolo[4,3-α][1,3]diazepine-   4-(4-Ethyl-4H-[1,2,4]triazol-3-yl)-pyridine-   (4-Ethyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-methanol-   4-Ethyl-5-pyridin-4-yl-4H-[1,2,4]triazole-3-carbaldehyde

The invention will now be illustrated by the following non-limitingexamples.

General Methods

All starting materials are commercially available or earlier describedin the literature. The ¹H and ¹³C NMR spectra were recorded either on aBrucker 400 or a Varian 400 at 400 MHz and 100 MHz, respectively. Themass spectra were recorded utilising electrospray (LC-MS; LC: Waters2790, column XTerra MS C₈ 2.5 μM 2.1×30 mm, buffer gradient H₂O+0.1%TFA: CH₃CN+0.04% TFA, MS: micromass ZMD) ionisation techniques.

EXAMPLE 1 a) Cinnamaldehyde tosyl hydrazone

Cinnamaldehyde (8.80 g, 66.59 mmol) was added to p-toluene sulfonamide(12.44 g, 66.79 mmol) in ethanol (70 mL). The reaction immediatelyturned solid and ethanol (20 mL) was again added. The reaction wasallowed to stir at room temperature for one hour and was then filtered.The solid washed with methanol and dried by reduced pressure to yieldthe title compound as a white solid (17.5 g, 87%). ¹H NMR (CDCl₃) δ(ppm): 8.23 (s, 1H), 7.88 (d, 2H), 7.60 (d, 1H), 7.34 (M, 6H), 6.83 (m,2H), 2.43 (s, 3H).

b) α-Methyl-cinnamaldehyde tosyl hydrazone

The title compound (32.2 g, 61%, white solid) was prepared by addingα-methylcinnamaldehyde (15 g, 102.6 mmol) to p-toluene sulfonamide (19.2g, 102.9 mmol) in ethanol (100 mL), followed by removal of the solventin vacuo to aid precipitation, and collection of the solid by filtrationand the solid obtained was dried under reduced pressure. ¹H NMR (CDCl₃)δ (ppm): 7.90 (s, 2H), 7.87 (s, 1H), 7.55 (s, 1H), 7.34 (m, 7H), 6.65(s, 1H), 2.45 (s, 3H), 2.08 (s, 3H).

EXAMPLE 2 a) 2-(3-Chloro-phenyl)-5-styryl-2H-tetrazole

An aqueous (5mL) solution of sodium nitrite (540.9 mg, 7.839 mmol) wasadded to a solution of 3-chloroaniline in water (7 mL), concentratedhydrochloric acid (3 mL) and ethanol (7 mL) via dropping funnel. Thereaction was allowed to stir at 0° C. for ten minutes. This solution waspoured into a dropping funnel and ice was added. This was added dropwiseto a solution of cinnamaldehyde tosyl hydrazone (2.3 g, 7.682 mmol) inpyridine (20 mL). This was allowed to stir overnight. An aqueous workupwas done extracting with dichlioromethane three times. The combinedlayers were washed with brine, dried over sodium sulfate, filtered andconcentrated. The crude product was purified by column chromatography(20% EtOAc/hexanes) to yield the title compound as a light purple solid(433.6 mg, 19%). ¹H NMR (CDCl₃) δ (ppm): 8.21 (m, 1H), 8.09 (d oft, 1H),7.89 (d, 1H), 7.61 (m, 2H), 7.49 (m, 5H), 7.24 (d, 1H).

Examples 2b to 2g were prepared as described for example 2a.

b) 2-(5-Chloro-2-fluoro-phenyl)-5-styryl-2H-tetrazole

The title compound (200 mg, 16%, dark brown solid) was obtained byadding the diazonium salt prepared from 5-chloro-2-fluoro-aniline (0.46mL, 4.07 mmol) with aqueous sodium nitrite (286 mg, 4.1 mmol in 3 mLwater), hydrochloric acid (5.5 mL, 17.8 mmol) in ethanol (4 mL) to asolution of cinnamaldehyde tosyl hydrazone (1.202 g, 4.0 mmol) inpyridine (30 mL). The crude product was partially purified by columnchromatography (5% EtOAc/hexanes) and used in the next step withoutadditional purification.

c) 5-Styryl-2-m-tolyl-2H-tetrazole

The title compound (320 mg, 30%, dark yellow solid) was obtained byadding the diazonium salt prepared from m-tolylamine (0.44 mL, 4.1 mmol)with aqueous sodium nitrite (286 mg, 4.1 mmol in 3 mL water),hydrochloric acid (5.5 mL, 17.8 mmol) in ethanol (4 mL), to a solutionof cinnamaldehyde tosyl hydrazone (1.207 g, 4.1 mmol) in pyridine (30mL). The crude product was purified by column chromatography (3-6%EtOAc/hexanes). ¹H NMR (CDCl₃) δ (ppm): 8.00 (s, 1H), 7.98 (d, 1H),7.88(d, 1H), 7.63 (m, 2H), 7.38-7.47 (m, 4H), 7.33 (d, 1H), 7.26 (d,1H), 2.55 (s, 3H).

d) 2-(3-Iodo-phenyl)-5-styryl-2H-tetrazole

The title compound is obtained by adding the diazonium salt preparedfrom 3-iodo-phenylamine (1 mmol) with aqueous sodium nitrite (1 mmol in0.75 mL water), hydrochloric acid (4.3 mmol in 1.3 mL water) in ethanol(1 mL), to a solution of cinnamaldehyde tosyl hydrazone (1 mmol) inpyridine (7.5 mL).

e) 3-(5-Styryl-tetrazol-2-yl)-benzonitrile

The title compound is obtained by adding the diazonium salt preparedfrom 3-aminobenzonitrile (1 mmol) with aqueous sodium nitrite (1 mmol in0.75 mL water), hydrochloric acid (4.3 mmol in 1.3 mL water) in ethanol(1 mL), to a solution of cinnamaldehyde tosyl hydrazone (1 mmol) inpyridine (7.5 mL).

f) 2-(2-Fluoro-5-methyl-phenyl)-5-styryl-2H-tetrazole

The title compound is obtained by adding the diazonium salt preparedfrom 2-fluoro-5-methyl-phenylamine (1 mmol) with aqueous sodium nitrite(1 mmol in 0.75 mL water), hydrochloric acid (4.3 mmol in 1.3 mL water)in ethanol (1 mL), to a solution of cinnamaldehyde tosyl hydrazone (1mmol) in pyridine (7.5 mL).

g) 2-(3-chlorophenyl)-5-[1-methyl-2-phenylvinyl]-2H-tetrazole

The title compound (3.82 g, 37%, orange solid) was obtained by addingthe diazonium salt prepared from 3-chloro-aniline (4.15 mL, 39.2 mmol)with aqueous sodium nitrite (2.7 g, 39.2 mmol in 25 mL water),hydrochloric acid (45 mL, 180 mmol) in ethanol (35 mL) to a solution ofcinnamaldehyde tosyl hydrazone (10.77 g, 34.25 mmol) in pyridine (50mL). The crude product was partially purified by column chromatography(15% EtOAc/hexanes) and used in the next step without additionalpurification. ¹H NMR (CDCl₃) δ (ppm): 8.22 (m, 1H), 8.11 (dt, 1H), 7.94(br s, 1H), 7.50 (m, 6H), 7.31 (m, 1H), 2.50 (s, 3H).

EXAMPLE 3 a)1-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl]-2-phenyl-ethane-1,2-diol

2-(3-Chloro-phenyl)-5-styryl-2H-tetrazole (127.0 mg, 0.446 mmol) wasweighed into a vial and citric acid (171.35 mg, 0.892 mmol) was addedfollowed by a 1:1 mixture of t-butanol and water (3 mL). Potassiumosmate oxide hydrate (0.3 mg) was added followed by 4-methyl morpholineN-oxide (in 1.5 mL of water) and the reaction was allowed to stirovernight. The reaction was filtered and washed with water and 1 Mhydrochloric acid to yield the title compound as a beige solid (95.4 mg,68%). ¹H NMR (MeOD) δ (ppm): 8.086 (s, 1H); 8.012 (d oft, 1H); 7.584 (m,2H); 7.252 (m, 5H); 5.148 (s, 2H).

Examples 3b to 3f were prepared as described for example 3a.

b)1-[2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-yl]-2-phenyl-ethane-1,2-diol

The title compound (used crude, yield determined after next step) wasobtained from 2-(5-chloro-2-fluoro-phenyl)-5-styryl-2H-tetrazole (637mg, 2.1 mmol) using citric acid (796 mg, 4.1 mmol), potassium osmateoxide hydrate (small scoop), 4-methyl morpholine N-oxide (275 mg, 2.3mmol) in 1:1 mixture of t-butanol and water (20 mL). The crude productfrom extraction was not further purified.

c) 1-Phenyl-2-(2-m-tolyl-2H-tetrazol-5-yl)-ethane-1,2-diol

The title compound (2.26 g g, used crude, yield determined after nextstep) was obtained from 5-styryl-2-m-tolyl-2H-tetrazole (1.44 g, 5.5mmol) using citric acid (2.1 g, 10.9 mmol), potassium osmate oxidehydrate (small scoop), 4-methyl morpholine N-oxide (710 mg, 6.1 mmol) in1:1 mixture of t-butanol and water (52 mL). The crude product fromextraction was not further purified.

d) 1-[2-(3-Iodo-phenyl)-2H-tetrazol-5-yl]-2-phenyl-ethane-1,2-diol

The title compound is obtained from2-(3-iodo-phenyl)-5-styryl-2H-tetrazole (1 mmol) using citric acid (2mmol), potassium osmate oxide hydrate (small scoop), 4-methyl morpholineN-oxide (1.1 mmol) in 1:1 mixture of t-butanol and water (10 mL). Thecrude product from extraction is not further purified.

e) 3-[5-(1,2-Dihydroxy-2-phenyl-ethyl)-tetrazol-2-yl]-benzonitrile

The title compound is obtained from3-(5-styryl-tetrazol-2-yl)-benzonitrile (1 mmol) using citric acid (2mmol), potassium osmate oxide hydrate (small scoop), 4-methyl morpholineN-oxide (1.1 mmol) in 1:1 mixture of t-butanol and water (10 mL). Thecrude product from extraction is not further purified.

f)1-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-2-phenyl-ethane-1,2-diol

The title compound is obtained from2-(2-fluoro-5-methyl-phenyl)-5-styryl-2H-tetrazole (1 mmol) using citricacid (2 mmol), potassium osmate oxide hydrate (small scoop), 4-methylmorpholine N-oxide (1.1 μmol) in 1:1 mixture of t-butanol and water (10mL). The crude product from extraction is not further purified.

EXAMPLE 4 a) 2-(3-Chloro-phenyl)-2H-tetrazole-5-carbaldehyde

1-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl]-2-phenyl-ethane-1,2-diol (50.0mg, 0.158 mmol) was weighed into a vial and toluene (3 ml) was added.Potassium carbonate (47.0 mg, 0.340 mmol) and lead (IV) acetate (70.0mg, 0.158 mmol) were added with stirring. The reaction was allowed tostir for 2.5 hours. The reaction was filtered and ethyl acetate wasadded to the filtrate and an aqueous workup was done. The organic layerwashed with brine, dried over sodium sulfate, filtered and concentrated.The crude product was purified by column chromatography (40%EtOAc/Hexanes) to yield the pure product as a white solid (22.3 mg,68%). ¹H NMR (CDCl₃) δ (Ppm): 10.34 (s, 1H); 8.27 (s, 1H); 8.14 (m, 1H);7.575 (d, 2H).

Examples 4b to 4f were prepared as described for example 4a.

b) 2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazole-5-carbaldehyde

The title compound (286 mg, 60% over 2 steps) was obtained1-[2-(5-chloro-2-fluorophenyl)-2H-tetrazol-5-yl]-2-phenyl-ethane-1,2-diol (crude from 2.1 mmol reactionabove) using potassium carbonate (1.0 g, 7 mmol) and lead (IV) acetate(980 mg, 2.2 mmol) in toluene (14 mL). The crude product was purified bycolumn chromatography (10-20% EtOAc/hexanes).

c) 2-m-Tolyl-2H-tetrazole-5-carbaldehyde

The title compound (870 mg, 84% over 2 steps) was obtained from1-phenyl-2-(2-m-tolyl-2H -tetrazol-5-yl)-ethane-1,2-diol (crude from 5.5mmol reaction above) using potassium carbonate (2.02 g, 14.6 mmol) andlead (IV) acetate (2.52 g, 5.7 mmol) in toluene (35 mL) anddichloromethane (20 mL). The crude product was purified by columnchromatography (10% EtOAc/hexanes). ¹H NMR (CDCl₃) δ (ppm): 10.34 (s,1H), 8.06 (s, 1H), 8.03 (d, 1H), 7.50 (t, 1H), 7.40 (d, 1H), 2.50 (s,3H).

d) 2-(3-Iodo-phenyl)-2H-tetrazole-5-carbaldehyde

The title compound is obtained from1-[2-(3-iodo-phenyl)-2H-tetrazol-5-yl]-2-phenyl-ethane-1,2-diol (1 mmol)using potassium carbonate (˜3 mmol) and lead (IV) acetate (1.05 mmol) intoluene (7 mL).

e) 3-(5-Formyl-tetrazol-2-yl)-benzonitrile

The title compound is obtained from3-[5-(1,2-dihydroxy-2-phenyl-ethyl)-tetrazol-2-yl]-benzonitrile (1 mmol)using potassium carbonate (˜3 mmol) and lead (IV) acetate (1.05 mmol) intoluene (7 mL).

f) 2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazole-5-carbaldehyde

The title compound is obtained from1-[2-(2-fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-2-phenyl-ethane-1,2-diol(1 mmol) using potassium carbonate (˜3 mmol) and lead (IV) acetate (1.05mmol) in toluene (7 mL).

EXAMPLE 5 a) [2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-methanol

2-(3-Chloro-phenyl)-2H-tetrazole-5-carbaldehyde (70.8 mg, 0.339 mmol)was dissolved in THF (5 mL) and lithium borohydride (25.9 mg, 1.187mmol) was added. The reaction was allowed to reflux under argon forthree hours and was then allowed to stir overnight at room temperature.The reaction was quenched with 1 M hydrochloric acid and an aqueousworkup was done extracting with ethyl acetate three times. The combinedorganic layers were washed with brine, dried over sodium sulfate,filtered and concentrated to yield the title compound as a white solid(75.8 mg, 106%). ¹H NMR (CDCl₃) δ (ppm): 8.190 (s, 1H), 8.070 (m, 1H),7.507 (m, 2H), 5.082 (s, 2H).

Examples 5b to 5f were prepared as described for example 5a.

b) [2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-yl]-methanol

The title compound (59.8 mg, 75%) was obtained from2-(5-chloro-2-fluoro-phenyl)-2H-tetrazole-5-carbaldehyde (78.9 mg, 0.35mmol) using lithium borohydride (1.0 mL, 2 mmol) in THF (5 mL). Thecrude product was purified by column chromatography (25-30%EtOAc/hexanes). ¹H NMR (CDCl₃) δ (ppm): 7.92 (dd, 1H), 7.52 (ddd, 1H),7.33 (t, 1H), 5.11 (d, 2H), 2.41 (t, 1H).

c) (2-m-Tolyl-2H-tetrazol-5-yl)-methanol

The title compound (221 mg, 96%, beige solid) was obtained from2-m-tolyl-2H-tetrazole-5-carbaldehyde (229 mg, 1.22 mmol) using lithiumborohydride (3.5 mL, 7 mmol) in THF (10 mL). The crude product waspurified by column chromatography (20-30% EtOAc/hexanes). ¹H NMR (CDCl₃)δ (ppm): 7.97 (s, 1H), 7.94 (d, 1H), 7.46 (t, 1H), 7.33 (d, 1H), 5.08(d, 2H), 2.50 (s, 3H), 2.40 (t, 1H).

d) [2-(3-Iodo-phenyl)-2H-tetrazol-5-yl]-methanol

The title compound is obtained from2-(3-iodo-phenyl)-2H-tetrazole-5-carbaldehyde (1 mmol) using lithiumborohydride (3-6 mmol) in THF (8-10 mL).

e) 3-(5-Hydroxymethyl-tetrazol-2-yl)-benzonitrile

The title compound is obtained from3-(5-formyl-tetrazol-2-yl)-benzonitrile (1 mmol) using lithiumborohydride (3-6 mmol) in THF (8-10 mL).

F) [2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-methanol

The title compound is obtained from2-(2-fluoro-5-methyl-phenyl)-2H-tetrazole-5-carbaldehyde (1 mmol) usinglithium borohydride (3-6 mmol) in THF (8-10 mL).

EXAMPLE 6 a) 1-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl-ethanol

2-(3-Chloro-phenyl)-2H-tetrazole-5-carbaldehyde (75.6 mg, 0.362 mmol)was dissolved in THF (2 mL) under argon and the flask was immersed inice. Methyl magnesium bromide (1 M solution/butyl ether 0.51 mL, 0.507mmol) was added dropwise while the reaction was cooled in ice. Afterfifteen minutes at 0° C., the ice bath was removed and the reaction wasallowed to stir at room temperature for two hours. 1 M Hydrochloric acidwas added to quench the reaction and an aqueous workup was doneextracting with ethyl acetate three times. The combined organic layerswere washed with brine, dried over sodium sulfate, filtered andconcentrated. The crude product was purified by column chromatography(3% MeOH/CH₂Cl₂) to yield the title compound as a clear oil (62.4 mg,77%). ¹H NMR (CDCl₃) δ (ppm): 8.18 (s, 1H), 8.06 (m, 1H), 7.50 (m, 2H),5.32 (m, 1H), 2.69 (d, 1H), 1.76 (d, 3H).

Examples 6b to 6f were prepared as described for example 6a.

b) 1-[2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-yl]-ethanol

The title compound (143.7 mg, 77%, estimated ˜90% pure as carried tonext steps) was obtained from2-(5-chloro-2-fluoro-phenyl)-2H-tetrazole-5-carbaldehyde (174 mg, 0.77mmol) using methyl magnesium bromide (2.0 mL, 2 mmol) in THF (5 mL). Thecrude product was purified by column chromatography (25-30%EtOAc/hexanes). ¹H NMR (CDCl₃) δ (ppm): 7.90 (dd, 1H), 7.51 (ddd, 1H),7.33 (t, 1H), 5.34 (q, 1H), 1.87 (t, 1H), 1.77 (d, 3H).

c) 1-(2-m-Tolyl-2H-tetrazol-5-yl)-ethanol

The title compound (221 mg, 96%, beige solid) was obtained from2-m-tolyl-2H-tetrazole-5-carbaldehyde (229 mg, 1.22 mmol) using methylmagnesium bromide (3.5 mL, 7 mmol) in THF (10 mL). The crude product waspurified by column chromatography (20-30% EtOAc/hexanes). ¹H NMR (CDCl₃)δ (ppm): 7.94 (s, 1H), 7.92 (d, 1H), 7.43 (t, 1H), 7.31 (d, 1H), 5.31(m, 1H), 2.48 (s, 3H), 1.77 (d, 3H).

d) 1-[2-(3-Iodo-phenyl)-2H-tetrazol-5-yl]-ethanol

The title compound is obtained from2-(3-iodo-phenyl)-2H-tetrazole-5-carbaldehyde (1 mmol) using methylmagnesium bromide (1.4 mmol) in THF (5 mL).

e) 3-[5-(1-Hydroxy-ethyl)-tetrazol-2-yl]-benzonitrile

The title compound is obtained from3-(5-formyl-tetrazol-2-yl)-benzonitrile (1 mmol) using methyl magnesiumbromide (1 mmol) in THF (5 mL).

f) 1-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethanol

The title compound is obtained from2-(2-fluoro-5-methyl-phenyl)-2H-tetrazole-5-carbaldehyde (1 mmol) usingmethyl magnesium bromide (1.4 mmol) in THF (5 mL).

EXAMPLE 7 a) 5-Bromomethyl-2-(3-chloro-phenyl)-2H-tetrazole

Dichloromethane (5 mL) was added to2-(3-chloro-phenyl)-2H-tetrazol-5-yl]-methanol (49.5 mg, 0.235 mmol)followed by triphenylphosphine (92.6 mg, 0.353 mmol). The reaction wasimmersed in a −40° C. bath and NBS (62.8 mg, 0.353 mmol) was added indichloromethane (2 mL). The reaction was allowed to stir under Argon fortwo hours. Saturated sodium bicarbonate was added and the cold bath wasremoved. An aqueous workup was done extracting the product withdichloromethane three times. The combined organic layers were washedwith brine, dried over sodium sulfate, filtered and concentrated. Thecrude product was purified by column chromatography (2% MeOH/CH₂Cl₂) toyield the title compound as a white solid (45.9 mg, 71%). ¹H NMR (CDCl₃)δ (ppm): 8.179 (

, 1H), 8.050 (m, 1H), 7.518 (m, 2H), 4.730 (s, 2H).

b) 5-(1-Bromo-ethyl)-2-(3-chloro-phenyl)-2H-tetrazole

The title compound is prepared according to the procedure for5-bromomethyl-2-(3-chlorophenyl)-2H -tetrazole (example 7a) using1-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl-ethanol as starting material.

EXAMPLE 8 a) Methanesulfonic acid1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]-ethyl ester

1-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl-ethanol (55.3 mg, 0.246 mmol)was dissolved in dichloromethane under Argon and triethylamine (41.1 uL,0.295 mmol) was added followed by methyl sulfonyl chloride (22.8 uL,0.295 mmol). The reaction was allowed to stir at room temperatureovernight.

Sodium bicarbonate (sat.) was added and an aqueous workup was doneextracting with ethyl acetate three times. The combined organic layerswere washed with brine, dried over sodium sulfate, filtered andconcentrated. The crude product was purified by an SPE tube (5%MeOH/CH₂Cl₂) to yield the title compound as a yellow oil (27.7 mg, 37%).¹H NMR (CDCl₃) δ (ppm): 8.18 (s, 1H), 8.07 (m, 1H), 7.533 (m, 2H), 6.15(q, 1H), 3.157 (s, 3H), 1.99 (d, 3H).

Examples 8b to 8k were prepared as described for example 8a.

b) Methanesulfonic acid2-(5-chloro-2-fluoro-phenyl)-2H-tetrazol-5-ylmethyl ester

The title compound was obtained from[2-(5-chloro-2-fluoro-phenyl)-2H-tetrazol-5-yl]-methanol (39 mg, 0.17mmol) using methane sulfonyl chloride (0.02 mL, 0.26 mmol) and triethylamine (0.05 mL, 0.36 mmol) in dichloromethane (5 mL). The crudeextraction product was divided into two samples and carried forward tothe next reaction without further purification.

c) Methanesulfonic acid1-[2-(5-chloro-2-fluoro-phenyl)-2H-tetrazol-5-yl]-ethyl ester

The title compound was obtained from1-[2-(5-chloro-2-fluoro-phenyl)-2H-tetrazol-5-yl]-ethanol (103 mg, 65%pure, 0.28 mmol) using methane sulfonyl chloride (0.05 mL, 0.65 mmol)and triethyl amine (0.15 mL, 1.1 mmol) in dichloromethane (5 mL). Thecrude extraction product was divided into three samples and carriedforward to the next reaction without further purification.

d) Methanesulfonic acid 2-m-tolyl-2H-tetrazol-5-ylmethyl ester

The title compound is obtained from(2-m-tolyl-2H-tetrazol-5-yl)-methanol (1 mmol) using methane sulfonylchloride (1.5 mmol) and triethyl amine (2 mmol) in dichloromethane (15mL).

e) Methanesulfonic acid 1-(2-m-tolyl-2H-tetrazol-5-yl)-ethyl ester

The title compound was obtained from1-(2-m-tolyl-2H-tetrazol-5-yl)-ethanol (1 mmol) using methane sulfonylchloride (1.5 mmol) and triethyl amine (2 mmol) in dichloromethane (15mL).

f) Methanesulfonic acid 2-(3-cyano-phenyl)-2H-tetrazol-5-ylmethyl ester

The title compound is obtained from3-(5-hydroxymethyl-tetrazol-2-yl)-benzonitrile (1 mmol) using methanesulfonyl chloride (1.5 mmol) and triethyl amine (2 mmol) indichloromethane (5 mL).

g) Methanesulfonic acid 1-[2-(3-cyano-phenyl)-2H-tetrazol-5-yl]-ethylester

The title compound is obtained from3-[5-(1-hydroxy-ethyl)-tetrazol-2-yl]-benzonitrile (1 mmol) usingmethane sulfonyl chloride (1.5 mmol) and triethyl amine (2 mmol) indichloromethane (15 mL).

h) Methanesulfonic acid2-(2-fluoro-5-methyl-phenyl)-2H-tetrazol-5-ylmethyl ester

The title compound is obtained from[2-(2-fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-methanol (1 mmol) usingmethane sulfonyl chloride (1.5 mmol) and triethyl amine (2 mmol) indichloromethane (5 mL).

i) Methanesulfonic acid1-[2-(2-fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethyl ester

The title compound is obtained from1-[2-(2-fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethanol (1 mmol) usingmethane sulfonyl chloride (1.5 mmol) and triethyl amine (2 mmol) indichloromethane (5 mL).

j) Methanesulfonic acid 2-(3-iodo-phenyl)-2H-tetrazol-5-ylmethyl ester

The title compound is obtained from[2-(3-iodo-phenyl)-2H-tetrazol-5-yl]-methanol (1 mmol) using methanesulfonyl chloride (1.5 mmol) and triethyl amine (2 mmol) indichloromethane (15 mL).

k) Methanesulfonic acid 1-[2-(3-iodo-phenyl)-2H-tetrazol-5-yl]-ethylester

The title compound was obtained from1-[2-(3-iodo-phenyl)-2H-tetrazol-5-yl]-ethanol (1 mmol) using methanesulfonyl chloride (1.5 mmol) and triethyl amine (2 mmol) indichloromethane (15 mL).

EXAMPLE 9 a)4-Methyl-5-pyridin-4-yl-2,4-dihydro-[1,2,4]triazole-3-thione

Isonicotinoyl chloride hydrochloride (27.5 g, 154.5 mmol) and4-methyl-3-thiosemicarbazide (16.4 g, 155.9 mmol) were mixed in pyridine(200 ml) and stirred under argon at ambient temperature overnight. Afterevaporation to dryness, aqueous sodium hydroxide (250 mL, 2M, 500 mmol)was added and the resulting solution was heated at 60° C. for 16 h.After cooling to room temperature, the solution was neutralized with 6Nhydrochloric acid. The precipitate that formed was collected byfiltration to give the title compound (pale yellow solid, 16.4 g, 55%).¹H NMR (DMSO-d6), δ (ppm): 8.78 (dd, 2H), 7.75 (dd, 2H), 3.59 (s, 3H).

EXAMPLE 10

Made in an analogous manner to above:

a) 4-Ethyl-5-pyridin-4-yl-2,4-dihydro-[1,2,4]triazole-3-thione

The title compound (pale yellow solid, 16.7 g, 58%) was prepared fromisonicotinoyl chloride hydrochloride (25.1 g, 140.8 mmol) and4-ethyl-3-thiosemicarbazide (16.87 g, 141.5 mmol) in pyridine (185 ml)with sodium hydroxide (220 mL, 2M, 440 mmol) added to the intermediateformed to effect cyclization. ¹H NMR (DMSO-d6) δ (ppm): 8.80 (dd, 2H),7.72 (dd, 2H), 4.11 (q, 2H), 3.59 (t, 3H).

EXAMPLE 114-Cyclopropyl-5-pyridin-4-yl-2,4-dihydro-[1,2,4]triazole-3-thione

A solution of isonicotinoyl hydrazide (2.62 g, 19.1 mmol) andcyclopropyl isothiocyanate (1.55 mL, 16.7 mmol) in methanol (15 mL) washeated at 60° C. for 1 h. The mixture was cooled to room temperature andthe solvent was removed. Aqueous sodium hydroxide (9 mL, 2M, 18 mmol)was added and the resulting solution was heated at 60° C. for 20 h.After cooling to room temperature, the solution was neutralized with 3Nhydrochloric acid. The precipitate that formed was collected byfiltration to give the title compound (pale yellow solid, 3.58 g, 98%).¹H NMR (DMSO-d6) δ (ppm): 8.76 (dd, 2H), 7.80 (dd, 2H), 1.00 (m, 2H),0.61 (m, 2H) (note one cyclopropyl-N signal blocked solvent signal at3.32 ppm).

EXAMPLE 12 4-(4-Methyl-5-methylsulfanyl-4H-[1,2,4]triazol-3-yl)-pyridine

To a solution of4-Methyl-5-pyridin-4-yl-2,4-dihydro-[1,2,4]triazole-3-thione (1000 mg,5.20 mmol) in 1 M sodium hydroxide (10 mL), added a solution ofiodomethane (0.52 mL, 8.32 mmol) in ethanol (3 mL). Stirred at RTovernight. Extracted into 200 mL dichloromethane and washed with brine(50 mL). Dried over anhydrous sodium sulfate, filtered and concentratedin vacuo to yield title compound (1.00 g, 94% yield). ¹H-NMR (CDCl₃) δ(ppm): 8.81 (d, 2H), 7.62 (d, 2H), 3.68 (s, 3H), 2.82 (s, 3H).

EXAMPLE 134-(4-Cyclopropyl-5-methylsulfanyl-4H-[1,2,4]triazol-3-yl)-pyridine

A solution of iodomethane (0.457 mL, 7.33 mmol) in ethanol (3 mL) wasadded to a solution of4-cyclopropyl-5-pyridin-4-yl-4H-[1,2,4]triazole-3-thiol (1 g, 4.58 mmol)in 1 M sodium hydroxide (10 mL) at room temperature. After stirringovernight, the reaction mixture was extracted with dichloromethane andthen the organic layer washed with brine, dried over anhydrous sodiumsulfate, filtered and concentrated to afford the titled compound (729.1mg, 69%, beige solid). ¹H NMR (CDCl₃) δ (ppm): 8.77 (d, 2H), 7.75 (m,2H), 3.23 (m, 1H), 2.82 (s, 3H), 1.17 (m, 2H), 0.80 (m, 2H).

EXAMPLE 14 a)4-(5-Methanesulfonyl-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine

To a solution of4-(4-Methyl-5-methylsulfanyl-4H-[1,2,4]triazol-3-yl)-pyridine (1000 mg,4.85 mmol) in acetic acid, added a solution of KMnO₄ (1.15 g, 7.28 mmol)in H₂O (50 mL) drop-wise. Stirred at RT for 3 hours. Added sodiumhydrogen sulfite until purple colour was discharged. Extracted intochloroform (3×100 mL). Washed organic layer with saturated sodiumbicarbonate (50 mL). Dried over anhydrous sodium sulfate, filtered andconcentrated in vacuo to yield title compound (1.01 g, 87% yield).¹H-NMR (CDCl₃) δ (ppm): 8.89 (d, 2H), 7.64 (d, 2H), 4.05 (s, 3H), 3.64(s, 3H).

b) 3-(5-Methanesulfonyl-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine

The title compound was prepared analogously to the sequence described inexample 9, 12, and 14 using nicotinoyl chloride hydrochloride asstarting material. ¹H NMR (CDCl₃) δ (ppm): 3.59 (s, 3H) 3.99 (s, 3H)7.52 (m, 1H) 8.02 (dt, 1H) 8.83 (dd, 1H) 8.91 (m, 1H).

c) 3-(3,5-Difluoro-phenyl)-5-methanesulfonyl-4-methyl-4H-[1,2,4]triazole

The title compound was prepared analogously to the sequence described inexample 9, 12, and 14 using 3,5-difluoro-benzoyl chloride as startingmaterial. ¹H NMR (DMSO-D6) δ (ppm): 3.60 (s, 3H) 3.89 (s, 3H) 7.56 (s,3H).

EXAMPLE 154-(4-Cyclopropyl-5-methanesulfonyl-4H-[1,2,4]triazol-3-yl)-pyridine

A solution of potassium permanganate (525 mg, 3.3 mmol) in water (22.0mL) was added to a solution of4-(4-cyclopropyl-5-methylsulfanyl-4H-[1,2,4]triazol-3-yl)-pyridine (514mg, 2.2 mmol) in acetic acid (11 mL) drop-wise at room temperature.After stirring for 3 hours, sodium hydrogen sulfite was added until thepurple color was discharged. The reaction mixture was extracted withchloroform and then the organic layer washed with saturated sodiumbicarbonate, dried over anhydrous sodium sulfate, filtered andconcentrated to afford the titled compound (546.7 mg, 94%, white solid).¹H NMR (CDCl₃) δ (ppm): 8.86 (d, 2H), 7.77 (d, 2H), 3.64 (m, 1H), 3.63(s, 3H), 1.25 (m, 2H), 1.01 (m, 2H).

EXAMPLE 16 a)Methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine

A mixture of 1000 mg (4.35 mmol) N-amino-N′,N″-dimethyl-guanidinehydriodide (Henry; Smith; J. Amer. Chem. Soc.; 73; 1951; 1858) and 774mg (4.35 mmol) isonicotinoyl chloride hydrochloride in 3 ml of pyridinewas heated with microwaves for 5 min at 160° C. K₂CO₃(sat) was added andthe mixture was extracted 4 times with CHCl₃. The organic phase wasdried and concentrated. Recrystallization from ethanol, water and EtOAcgave 216 mg (26%) of a yellow white solid. ¹H NMR (DMSO), d (ppm): 2.85(d, 3H) 3.45 (s, 3H) 6.25 (d, 1H) 7.65 (m, 2H) 8.67 (m, 2H).

b)[5-(3,5-Difluoro-phenyl)-4-methyl-4H-[1,2,4]triazol-3-yl]-methyl-amine

The title compound was prepared according to the procedure formethyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine (example16a) from 3,5-difluoro-benzoyl chloride. ¹H NMR (DMSO-D6) d (ppm): 2.83(d, 3H) 3.41 (s, 3H) 6.20 (d, 1H) 7.35 (m, 3H),

c) Methyl-(4-methyl-5-pyridin-3-yl-4H-[1,2,4]triazol-3-yl)-amine

The title compound is prepared according to the procedure formethyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine (example16a) from nicotinoyl chloride hydrochloride.

EXAMPLE 17 a)3-Pyridin-4-yl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine

A solution of 750 mg (3.1 mmol)(1,4,5,6-tetrahydro-pyrimidin-2-yl)-hydrazine hydroiodide (ref. Krezel,Izabella; Pharmazie; EN; 49; 1; 1994; 27-31) and 552 mg (3.1 mmol)isonicotinoyl chloride hydrochloride in 3 ml pyridine was heated at 120°C. over night. The reaction mixture was cooled and diluted with K₂CO₃(sat) and extracted with 3×10 ml chloroform. The combined organicextracts were dried and concentrated. Flash chromatography (CH₂Cl₂/MeOH10:1) afforded 83 mg (18%) of a white solid. ¹H NMR (CDCl₃) d (ppm):1.91 (m, 2H) 3.24 (m, 2H) 4.13 (m, 2H) 7.67 (m, 2H) 8.65 (m, 2H).

b) 3-Pyridin-3-yl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine

The title compound is prepared according to the procedure for3-pyridin-4-yl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine(example 17a) from nicotinoyl chloride hydrochloride.

c)3-(3,5-Difluoro-phenyl)-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine

The title compound is prepared according to the procedure for3-pyridin-4-yl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine(example 17a) from 3,5-difluoro-benzoyl chloride.

EXAMPLE 18 2-(methylthio)-4,5,6,7-tetrahydro-1H-1,3-diazepine

Methyl iodide (0.55 ml, 1.15 mmol) was added to a solution of1,3-diazepane-2-thione (1.00 g, 7.68 mmol) in acetone (8 ml). Thereaction mixture was refluxed for 15 min. EtOH was added to the hotsolution to dissolve the solids. After cooling to r.t. hex. was addedand the precipitate was collected by filtration, washed with hex. anddried to give 1.79 g (86%) crude title compound which was used directlyin the next step.

EXAMPLE 19 1,3-diazepan-2-one hydrazone hydroiodide

Hydrazine hydrate (0.44 ml, 7.23 mmol) was added to a solution of2-(methylthio)-4,5,6,7-tetrahydro-1H-1,3-diazepine hydroiodide (1.79 d,6.58 mmol) in EtOH (12 ml). The reaction mixture was refluxed for 5 hand cooled to r.t. Et₂O was added and the product was collected byfiltration, washed with Et₂O and dried under vacuum to give 1.46 g(100%) crude title compound which was used directly in the next step.

EXAMPLE 20 a)3-pyridin-4-yl-6,7,8,9-tetrahydro-5H-[1,2,4]triazolo[4,3-a][1,3]diazepine

A mixture of 1,3-diazepan-2-one hydrazone hydroiodide (1.00 g, 3.9 mmol)and isonicotinoyl chloride hydrochloride (695 mg, 3.9 mmol) was heatedin a microwave reactor at 160° C. for 10 min. The reaction mixture waspoured into Na_(a)CO₃ solution, sat., and extracted with DCM. Theorganic phase was dried and concentrated. Flash chromatography (DCM/MeOH20:1) gave 1.74 g crude title compound which was used directly in thenext step. ¹H NMR: 1.89 (s, 4H) 3.15 (m, 2H) 3.86 (m, 2H) 7.44 (d, 2H)8.66 (d, 2H).

b) 3-Pyridin-3-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene

The title compound is obtained from nicotinoyl chloride hydrochlorideaccording to the procedure described for3-pyridin-4-yl-6,7,8,9-tetrahydro-5H-[1,2,4]triazolo[4,3-α][1,3]diazepine(example 20a).

c)3-(3,5-Difluoro-phenyl)-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene

The title compound is obtained from 3,5-difluoro-benzoyl chlorideaccording to the procedure described for3-pyridin-4-yl-6,7,8,9-tetrahydro-5H-[1,2,4]triazolo[4,3-α][1,3]diazepine(example 20a).

EXAMPLE 21 4-(4-Ethyl-4H-[1,2,4]triazol-3-yl)-pyridine

4-Ethyl-5-pyridin-4-yl-2,4-dihydro-[1,2,4]triazole-3-thione (4.2 g, 20.4mmol) was slowly added to Raney nickel (˜40g, washed three times with 25mL portions of ethanol) in ethanol (50 mL). The resulting mixture wasstirred at 65° C. for approximately 28 hours. The solution mixture wascarefully filtered and concentrated in vacuo to yield the title compound(2.88 g, 81.3%). ¹H NMR (CDCl₃) δ (ppm): 8.81 (d, 2H), 8.33 (s, 1H),7.62 (d, 2H), 8.18 (q, 2H), 1.51 (t, 3H).

EXAMPLE 22 (4-Ethyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-methanol

A solution of 4-(4-ethyl-4H-[1,2,4]triazol-3-yl)-pyridine (2.55 g, 14.6mmol) in 37% formaldehyde (˜12 mL) was stirred at 37° C. for 16 hours.Flash chromatography (10% methanolic ammonia in dichloromethane) yieldedtitle product (2.55 g, 85%, used without further purification to removeremaining para-formaldehyde). ¹H NMR (CDCl₃) δ (ppm): 8.81 (d, 2H), 7.72(d, 2H), 5.74 (t, 1H), 4.73 (d, 2H), 4.26 (q, 2H), 1.27 (t, 3H).

EXAMPLE 23 a) 4-Ethyl-5-pyridin-4-yl-4H-[1,2,4]triazole-3-carbaldehyde

Dichloromethane (4 mL) was added to a vial containing(4-ethyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-methanol (56.7 mg, 0.279mmol) and manganese dioxide (364.3 mg, 4.19 mmol) was added. The vialwas sealed and the reaction was allowed to stir for two hours. Thereaction was filtered through celite and concentrated to yield the titlecompound. ¹H NMR (CDCl₃) δ (Ppm): 10.21 (s, 1H), 8.88 (d, 2H), 7.63 (d,2H), 4.45 (q, 2H), 1.48 (t, 3H).

b) 4-Methyl-5-pyridin-3-yl-4H-[1,2,4]triazole-3-carbaldehyde

The title compound is prepared analogously to the sequence described for4-(4-ethyl-4H-[1,2,4]triazol-3-yl)-pyridine (example 21),(4-ethyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)methanol (example 22),and 4-ethyl-5-pyridin-4-yl-4H-[1,2,4]triazole-3-carbaldehyde (example23a) by using4-methyl-5-pyridin-3-yl-2,4-dihydro-[1,2,4]triazole-3-thione as startingmaterial.

c) 5-(3,5-Difluoro-phenyl)-4-methyl-4H-[1,2,4]triazole-3-carbaldehyde

The title compound is prepared analogously to the sequence described for4-(4-ethyl-4H-[1,2,4]triazol-3-yl)-pyridine (example 21),(4-ethyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)methanol (example 22),and 4-ethyl-5-pyridin-4-yl-4H-[1,2,4]triazole-3-carbaldehyde (example23a) by using5-(3,5-Difluoro-phenyl)-4-methyl-2,4-dihydro-[1,2,4]triazole-3-thione asstarting material.

EXAMPLE 24 a) Ethyl4-{[2-(3-chlorophenyl)-2H-tetrazol-5-yl]methyl}piperazine-1-carboxylate

2-(3-Chloro-phenyl)-2H-tetrazole-5-carbaldehyde (22.3 mg, 0.107 mmol)was dissolved in 1,2-dichloroethane under argon and ethyl-1-piperazinecarboxylate (16.4 uL, 0.112 mmol) was added followed by sodiumtriacetoxy borohydride (31.8 mg, 0.150 mmol). The reaction was allowedto stir overnight. Ethyl acetate was added and the solution was washedwith sodium bicarbonate (sat.), brine, dried over sodium sulfate,filtered and concentrated. The crude product was purified by columnchromatography using 45% EtOAc/Hexanes and 100% EtOAc to yield the titlecompound as a white solid (17.4 mg, 46%). ¹HNMR (CDCl₃) δ (ppm): 8.190(s, 1H); 8.070 (m, 1H); 7.469 (m, 2H); 4.139 (q, 2H); 3.983 (s, 2H);3.541 (m, 4H); 2.604 (m, 4H); 1.263 (t, 3H).

Examples 24b to 24f were prepared as described for example 24a.

b)4-[2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-ylmethyl]-piperazine-1-carboxylicacid ethyl ester

The title compound (28 mg, 79%, yellow oil) was obtained from2-(5-chloro-2-fluorophenyl)-2H-tetrazole-5-carbaldehyde (21.8 mg, 0.1mmol) using ethyl-1-piperazine carboxylate (0.03 uL, 0.2 mmol) andsodium triacetoxy borohydride (50 mg, 0.24 mmol) in 1,2-dichloroethane(1.3 mL). The crude product was purified by column chromatography(35-40% EtOAc/hexanes). ¹HNMR (CDCl₃) δ (ppm): 7.93 (dd, 1H), 7.51 (ddd,1H), 7.34 (t, 1H), 4.14 (q, 2H), 4.02 (s, 2H), 3.55 (m, 4H), 2.61 (m,4H), 1.27 (t, 3H).

c) 4-(2-m-Tolyl-2H-tetrazol-5-ylmethyl)-piperazine-1-carboxylic acidethyl ester

The title compound (36 mg, 57%, yellow oil) was obtained from2-m-tolyl-2H-tetrazole-5-carbaldehyde (36.1 mg, 0.19 mmol) usingethyl-1-piperazine carboxylate (0.04 uL, 0.27 mmol) and sodiumtriacetoxy borohydride (75 mg, 0.35 mmol) in 1,2-dichloroethane (2.5mL). The crude product was purified by column chromatography (20-35%EtOAc/hexanes). ¹H NMR (CDCl₃) δ (ppm): 7.97 (s, 1H), 7.94 (d, 1H), 7.45(t, 1H), 7.32 (d, 1H), 4.14 (q, 2H), 4.00 (s, 2H), 3.55 (m, 4H), 2.61(m, 4H), 2.49 (s, 3H), 1.27 (t, 3H).

d) 4-[2-(3-Iodo-phenyl)-2H-tetrazol-5-ylmethyl]-piperazine-1-carboxylicacid ethyl ester

The title compound is obtained from2-(3-iodo-phenyl)-2H-tetrazole-5-carbaldehyde (1 mmol) usingethyl-1-piperazine carboxylate (1.1-2 mmol) and sodium triacetoxyborohydride (1.5-2 mmol) in 1,2-dichloroethane (10-15 mL).

e) 4-[2-(3-Cyano-phenyl)-2H-tetrazol-5-ylmethyl]-piperazine-1-carboxylicacid ethyl ester

The title compound is obtained from3-(5-formyl-tetrazol-2-yl)-benzonitrile (1 mmol) usingethyl-1-piperazine carboxylate (1.1-2 mmol) and sodium triacetoxyborohydride (1.5-2 mmol) in 1,2-dichloroethane (10-15 mL).

f)4-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-ylmethyl]-piperazine-1-carboxylicacid ethyl ester

The title compound is obtained from2-(2-fluoro-5-methyl-phenyl)-2H-tetrazole-5-carbaldehyde (1 mmol) usingethyl-1-piperazine carboxylate (1.1-2 mmol) and sodium triacetoxyborohydride (1.5-2 mmol) in 1,2-dichloroethane (10-15 mL).

EXAMPLE 25 a)4-[5-({[2-(3-chlorophenyl)-2H-tetrazol-5-yl]methyl}thio)-4-cyclopropyl-4H-1,2,4-triazol-3-yl]pyridine

5-Bromomethyl-2-(3-chloro-phenyl)-2H-tetrazole (18.7 mg, 0.068 mmol) wasweighed into a vial and potassium carbonate (10.4 mg, 0.075 mmol)4-cyclopropyl-5-pyridin-4-yl-2,4-dihydro-[1,2,4]triazole-3-thione (14.8mg, 0.068 mmol) and acetonitrile (3 mL) were added. The vial was sealedand the reaction was allowed to stir at room temperature overnight. Thereaction mixture was put through an SPE tube (10% methanol indichloromethane) to yield the title compound as a white solid (18.3 mg,66%). ¹H NMR δ (ppm): 8.78 (d, 2H), 8.16 (s, 1H), 8.04 (m, 1H), 7.76 (d,2H), 7.49 (m, 2H), 4.97 (s, 2H), 3.29 (m, 1H), 1.19 (m, 2H), 0.84 (m,2H).

Examples 25b to 25y may be prepared as described for example 25a.

b)4-[5-({1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}thio)-4-cyclopropyl-4H-1,2,4-triazol-3-yl]pyridine

The title compound (25.2 mg, 68%, white solid) was prepared frommethanesulfonic acid 1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]-ethyl ester(26.4 mg, 0.087 mmol) using potassium carbonate (13.3 mg, 0.096 mmol)and 4-cyclopropyl-5-pyridin-4-yl-2,4-dihydro-[1,2,4]triazole-3-thione(19.0 mg, 0.087 mmol) in acetonitrile (3 mL) at room temperatureovernight. The reaction mixture was purified by chromatography using asilica SPE tube (2% methanol in dichloromethane). ¹H NMR (CDCl₃) δ(ppm): 8.78 (d, 2H), 8.16 (s, 1H), 8.04 (m, 1H), 7.75 (d, 2H), 7.49 (m,2H), 5.67 (q, 1H), 3.24 (m, 1H), 2.08 (d, 3H), 1.16 (m, 2H), 0.82 (m,2H).

c) Ethyl4-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazine-1-carboxylate

The title compound (12.3 mg, 37%, yellow oil) was prepared from methylsulfonic acid 1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]-ethyl ester (27.7mg, 0.091 mmol) using potassium carbonate (13.8 mg, 0.100 mmol) and1-ethoxycarbonyl piperazine (13.3 uL, 0.091 mmol) in acetonitrile (4 mL)at 80° C. overnight. The product was purified was by chromatographyusing a silica SPE tube (10% MeOH/CH₂Cl₂) followed by a secondchromatography using a silica SPE tube (5% MeOH/CH₂Cl₂). ¹H NMR (CDCl₃)δ (ppm): 8.17 (s, 1H), 8.07 (dt, 1H), 7.50 (m, 2H), 4.29 (q, 1H), 4.10(q, 2H), 3.52 (m, 4H), 2.56 (m, 4H), 1.64 (d, 3H), 1.24 (t, 3H).

d)4-{5-[2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-ylmethylsulfanyl]-4-methyl-4H-[1,2,4]triazol-3-yl}-pyridine

The title compound (32.1 mg, 94%, white solid) was obtained frommethanesulfonic acid 2-(5-chloro-2-fluoro-phenyl)-2H-tetrazol-5-ylmethylester (˜26 mg, 0.085 mmol) using potassium carbonate (38 mg, 0.27 mmol)and 4-methyl-5-pyridin-4-yl-2,4-dihydro-[1,2,4]triazole-3-thione (20 mg,0.10 mmol) in acetonitrile (1.5 mL) at room temperature overnight. Thereaction mixture was purified by chromatography using a silica SPE tube(2-3% methanol in dichloromethane). ¹H NMR (CDCl₃) δ (ppm): 8.80 (br.s,2H), 7.87 (dd, 1H), 7.62 (d, 2H), 7.49 (m, 1H), 7.31 (t, 1H), 4.84 (s,2H), 3.71 (s, 3H).

e)4-{5-[2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-ylmethylsulfanyl]-4-cyclopropyl-4H-[1,2,4]triazol-3-yl}-pyridine

The title compound (30.7 mg, 84%, white filmy solid) was obtained frommethanesulfonic acid 2-(5-chloro-2-fluoro-phenyl)-2H-tetrazol-5-ylmethylester (˜26 mg, 0.085 mmol) using potassium carbonate (38 mg, 0.27 mmol)and 4-cyclopropyl-5-pyridin-4-yl-2,4-dihydro-[1,2,4]triazole-3-thione(22 mg, 0.10 mmol) in acetonitrile (1.5 mL) at room temperatureovernight. The reaction mixture was purified by chromatography using asilica SPE tube (2-3% methanol in dichloromethane). ¹H NMR (CDCl₃) δ(ppm): 8.76 (br.s, 2H), 7.88 (dd, 1H), 7.75 (d, 2H), 7.49 (m, 1H), 7.32(dd, 1H), 4.96 (s, 2H), 3.30 (septet, 1H), 1.18 (m, 2H), 0.83 (m, 2H).

f)4-(5-{1-[2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-yl]-ethylsulfanyl}-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine

The title compound (12.3 mg, 32%, white foam) was obtained frommethanesulfonic acid1-[2-(5-chloro-2-fluoro-phenyl)-2H-tetrazol-5-yl]-ethyl ester (˜29.5 mg,0.09 mmol) using potassium carbonate (38 mg, 0.27 mmol) and4-methyl-5-pyridin-4-yl-2,4-dihydro-[1,2,4]triazole-3-thione (22 mg,0.11 mmol) in acetonitrile (1.5 mL) at room temperature overnight. Thereaction mixture was purified by chromatography using a silica SPE tube(2-3% methanol in dichloromethane). ¹H NMR (CDCl₃) δ (ppm): 8.80 (br.s,2H), 7.85 (dd, 1H), 7.62 (d, 2H), 7.50 (m, 1H), 7.31 (t, 1H), 5.30 (q,1H), 3.66 (s, 3H), 2.05 (d, 3H).

g)4-(5-{1-[2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-yl]-ethylsulfanyl}-4-cyclopropyl-4H-[1,2,4]triazol-3-yl)-pyridine

The title compound (34.1 mg, 84%, white foam) was obtained frommethanesulfonic acid1-[2-(5-chloro-2-fluoro-phenyl)-2H-tetrazol-5-yl]-ethyl ester (˜29.5 mg,0.09 mmol) using potassium carbonate (38 mg, 0.27 mmol) and4-cyclopropyl-5-pyridin-4-yl-2,4-dihydro-[1,2,4]triazole-3-thione (23mg, 0.10 mmol) in acetonitrile (1.5 mL) at room temperature overnight.The reaction mixture was purified by chromatography using a silica SPEtube (2-2.5% methanol in dichloromethane). ¹H NMR (CDCl₃) δ (ppm): 8.78(d, 2H), 7.90 (dd, 1H), 7.75 (d, 2H), 7.49 (m, 1H), 7.32 (t, 1H), 5.67(q, 1H), 3.26 (septet, 1H), 2.07 (d, 3H), 1.17 (m, 2H), 0.81 (m, 2H).

h)4-{1-[2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-yl]-ethyl}-piperazine-1-carboxylicacid ethyl ester

The title compound (25.2 mg, 72%, yellow oil, ˜90% pure) was preparedfrom methanesulfonic acid1-[2-(5-chloro-2-fluoro-phenyl)-2H-tetrazol-5-yl]-ethyl ester (˜29.5 mg,0.09 mmol) using potassium carbonate (38 mg, 0.27 mmol) and1-ethoxycarbonyl piperazine (20 uL, 0.14 mmol) in acetonitrile (1.5 mL)at 80° C. overnight. The product was purified by chromatography using asilica SPE tube (25-35% ethyl acetate in hexane). ¹H NMR (CDCl₃) δ(ppm): 7.91 (dd, 1H), 7.51 (ddd, 1H), 7.33 (t, 1H), 4.32 (q, 1H), 4.11(q, 2H), 3.52 (m, 4H), 2.61 (m, 2H), 2.51 (m, 2H), 1.65 (d, 3H), 1.24(t, 3H).

i)4-[4-Cyclopropyl-5-(2-m-tolyl-2H-tetrazol-5-ylmethylsulfanyl)-4H-[1,2,4]triazol-3-yl]-pyridine

The title compound (29%, off-white solid) was obtained frommethanesulfonic acid 2-m-tolyl-2H -tetrazol-5-ylmethyl ester (1 mmol)using potassium carbonate (3 mmol) and4-cyclopropyl-5-pyridin-4-yl-2,4-dihydro-[1,2,4]triazole-3-thione (1mmol) in acetonitrile (15 mL) at room temperature overnight. ¹H NMR(CDCl₃) δ (ppm): 8.77 (d, 2H), 7.93 (s, 1H), 7.91 (d, 1H), 7.75 (d, 2H),7.42 (t, 1H), 7.31 (d, 1H), 4.96 (s, 2H), 3.28 (m, 1H), 2.46 (s, 3H),1.18 (m, 2H), 0.84 (m, 2H).

j)4-{4-Cyclopropyl-5-[1-(2-m-tolyl-2H-tetrazol-5-yl)-ethylsulfanyl]-4H-[1,2,4]triazol-3-yl}-pyridine

The title compound (31%, off-white solid) was obtained frommethanesulfonic acid 1-(2-m-tolyl-2H-tetrazol-5-yl)-ethyl ester (1 mmol)using potassium carbonate (3 mmol) and4-cyclopropyl-5-pyridin-4-yl-2,4-dihydro-[1,2,4]triazole-3-thione (1mmol) in acetonitrile (15 mL) at room temperature overnight. ¹H NMR inCDCl3: 8.76 (d, 2H), 7.93 (s, 1H), 7.91 (d, 1H), 7.74 (d, 2H), 7.43 (t,1H), 7.30 (d, 1H), 5.65 (q, 1H), 3.22 (m, 1H), 2.46 (s, 3H), 2.08 (d,3H), 1.16 (m, 2H), 0.79 (m, 2H).

k)4-{4-Methyl-5-[1-(2-m-tolyl-2H-tetrazol-5-yl)-ethylsulfanyl]-4H-[1,2,4]triazol-3-yl}-pyridine

The title compound is obtained from methanesulfonic acid1-(2-m-tolyl-2H-tetrazol-5-yl)ethyl ester (1 mmol) using potassiumcarbonate (3 mmol) and4-cyclopropyl-5-pyridin-4-yl-2,4-dihydro-[1,2,4]triazole-3-thione (1mmol) in acetonitrile (15 mL) at room temperature overnight.

l)3-[5-(4-Cyclopropyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-ylsulfanylmethyl)-tetrazol-2-yl]-benzonitrile

The title compound is obtained from methanesulfonic acid2-(3-cyano-phenyl)-2H-tetrazol-5-ylmethyl ester (1 mmol) using potassiumcarbonate (3 mmol) and4-cyclopropyl-5-pyridin-4-yl-2,4-dihydro-[1,2,4]triazole-3-thione (1mmol) in acetonitrile (15 mL) at room temperature overnight.

m)3-{5-[1-(4-Cyclopropyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-ylsulfanyl)-ethyl]-tetrazol-2-yl}-benzonitrile

The title compound is obtained methanesulfonic acid1-[2-(3-cyano-phenyl)-2H-tetrazol-5-yl]-ethyl ester (1 mmol) usingpotassium carbonate (3 mmol) and4-cyclopropyl-5-pyridin-4-yl-2,4-dihydro-[1,2,4]triazole-3-thione (1mmol) in acetonitrile (15 mL) at room temperature overnight.

n)3-{5-[1-(4-Methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-ylsulfanyl)-ethyl]-tetrazol-2-yl}benzonitrile

The title compound is obtained methanesulfonic acid1-[2-(3-cyano-phenyl)-2H-tetrazol-5-yl]-ethyl ester (1 mmol) usingpotassium carbonate (3 mmol) and4-cyclopropyl-5-pyridin-4-yl-2,4-dihydro-[1,2,4]triazole-3-thione (1mmol) in acetonitrile (15 mL) at room temperature overnight.

o)4-{4-Cyclopropyl-5-[2-(2-fluoro-5-methyl-phenyl)-2H-tetrazol-5-ylmethylsulfanyl]-4H-[1,2,4]triazol-3-yl}-pyridine

The title compound is obtained from methanesulfonic acid2-(2-fluoro-5-methyl-phenyl)-2H -tetrazol-5-ylmethyl ester (1 mmol)using potassium carbonate (3 mmol) and4-cyclopropyl-5-pyridin-4-yl-2,4-dihydro-[1,2,4]triazole-3-thione (1mmol) in acetonitrile (15 mL) at room temperature overnight.

p)4-(4-Cyclopropyl-5-{1-[2-(2-fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethylsulfanyl}-4H-[1,2,4]triazol-3-yl)-pyridine

The title compound is obtained from methanesulfonic acid1-[2-(2-fluoro-5-methylphenyl)-2H -tetrazol-5-yl]-ethyl ester (1 mmol)using potassium carbonate (3 mmol) and4-cyclopropyl-5-pyridin-4-yl-2,4-dihydro-[1,2,4]triazole-3-thione (1mmol) in acetonitrile (15 mL) at room temperature overnight.

q)4-(5-{1-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethylsulfanyl}-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine

The title compound is obtained from methanesulfonic acid1-[2-(2-fluoro-5-methylphenyl)-2H -tetrazol-5-yl]-ethyl ester (1 mmol)using potassium carbonate (3 mmol) and4-cyclopropyl-5-pyridin-4-yl-2,4-dihydro-[1,2,4]triazole-3-thione (1mmol) in acetonitrile (15 mL) at room temperature overnight.

In a similar manner, the following compounds were prepared:

r)3-[4-methyl-5-({[2-(3-methylphenyl)-2H-tetrazol-5-yl]methyl}thio)-4H-1,2,4-triazol-3-yl]benzonitrile;yield 7.1 mg, 23%, clear oil; ¹HNMR CDCl₃: 7.93 (m, 4H), 7.82 (d of t,1H), 7.67 (t, 1H), 7.44 (t, 1H), 7.28 (d, 1H), 4.82 (s, 2H), 3.64 (s,3H), 2.47 (s, 3H).

s)5-({[5-(3,5-difluorophenyl)-4-ethyl-4H-1,2,4-triazol-3-yl]thio}methyl)-2-(3-methylphenyl)-2H-tetrazole;yield 23.7 mg, 77%, clear oil; ¹HNMR CDCl₃: 7.89 (m, 2H), 7.43 (t, 1H),7.33 (d, 1H), 7.17 (d of d, 2H), 6.99 (t of t, 1H), 4.87 (s, 2H), 4.03(q, 2H), 2.47 (s, 3H), 1.33 (t, 3H).

t)3-[4-methyl-5-({1-[2-(3-methylphenyl)-2H-tetrazol-5-yl]ethyl)thio)-4H-1,2,4-triazol-3-yl]benzonitrile;yield 39.1 mg, 81%, clear oil; ¹H NMR CDCl₃: 7.89 (m, 4H), 7.79 (d of t,1H), 7.66 (t, 1H), 7.41 (t, 1H), 7.33 (d, 1H), 5.24 (q, 1H), 3.55 (s,3H), 2.46 (s, 3H), 2.04 (d, 3H).

u)5-({[5-(3,5-difluorophenyl)-4-ethyl-4H-1,2,4-triazol-3-yl]thio}ethyl)-2-(3-methylphenyl)-2H-tetrazole;yield 34.6 mg, 66%, sticky white solid; ¹HNMR CDCl₃: 7.89 (m, 2H), 7.42(t, 1H), 7.32 (d, 1H), 7.14 (m, 2H), 6.97 (t oft, 1H), 5.36 (q, 1H),3.95 (q, 2H), 2.46 (s, 3H), 2.05 (d, 3H), 1.27 (t, 3H).

v)6-(4-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazin-1-yl)nicotinonitrile;yield 36.9 mg, 71%, yellow solid; ¹HNMR CDCl₃: 8.38 (m, 1H); 8.16 (m,1H); 8.06 (m, 1H); 7.60 (d, 1H); 7.57 (d, 1H); 7.50 (m, 1H); 6.56 (m,1H); 4.34 (q, 1H); 3.71 (m, 4H); 2.69 (m, 4H); 1.69 (d, 3H).

w)3-(4-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazin-1-yl)pyrazine-2-carbonitrile;yield 15.4 mg, 47%, yellow oil; ¹HNMR CDCl₃: 8.23 (m, 1H); 8.18 (m, 1H);8.07 (m, 1H); 7.99 (m, 1H); 7.50 (m, 2H); 4.34 (q, 1H); 3.87 (m, 4H);2.75 (m, 4H); 1.68 (d, 3H).

x)2-(4-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazin-1-yl)nicotinonitrile;yield 22 mg, 42%, clear oil; ¹HNMR CDCl₃: 8.33 (m, 1H); 8.19 (m, 1H);8.08 (m, 1H); 7.75 (m, 1H); 7.51 (m, 2H); 6.73 (m, 1H); 4.33 (q, 1H);3.77 (m, 4H); 2.75 (m, 4H); 1.68 (d, 3H).

y)1-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}-4-(3-nitropyridin-2-yl)piperazine;yield 30.3 mg, 55%, yellow oil; ¹HNMR CDCl₃: 8.29 (m, 1H); 8.18 (m, 1H);8.08 (m, 2H); 7.50 (m, 2H); 6.73 (m, 1H); 4.33 (q, 1H); 3.47 (m, 4H);2.71 (m, 4H); 1.67 (d, 3H).

z)2-({1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}thio)-imidazo[4,5-b]pyridine;yield 53 mg, 49%, yellow solid; ¹HNMR CDCl₃:8.33 (m, 1H), 8.10 (br.s.,1H), 8.00 (m, 2H), 7.48 (m, 2H), 7.25 (m, 1H), 5.45 (q, 1H), 2.05 (d,3H).

EXAMPLE 26 a)Methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-(2-m-tolyl-2H-tetrazol-5-ylmethyl)-amine

The title compound (53%, yellow oil) was obtained from methanesulfonicacid 2-m-tolyl-2H -tetrazol-5-ylmethyl ester (1 mmol) using sodiumhydride (2 mmol) andmethyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine (1.8 mmol)in DMF (5 mL) at 60° C. overnight. ¹HNMR CDCl₃: 8.78 (d, 2H), 7.93 (s,1H), 7.92 (d, 1H), 7.66 (d of d, 2H), 7.44 (t, 1H), 7.33 (d, 1H), 4.75(s, 2H), 3.76 (s, 3H), 3.09 (s, 3H), 2.48 (s, 3H).

Examples 26b to 26an may be prepared as described for example 26a.

b)Methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-[1-(2-m-tolyl-2H-tetrazol-5-yl)-ethyl]-amine

The title compound (50%, yellow oil) was obtained from methanesulfonicacid 1-(2-m-tolyl-2H -tetrazol-5-yl)-ethyl ester (1 mmol) using sodiumhydride (2 mmol) andmethyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine (1.8 mmol)in DMF (5 mL) at 60° C. overnight. ¹HNMR CDCl₃: 8.77 (d, 2H), 7.94 (s,1H), 7.92 (d, 1H), 7.67 (d of d, 2H), 7.44 (t, 1H), 7.32 (d, 1H), 5.08(q, 1H), 3.76 (s, 3H), 2.96 (s, 3H), 2.48 (s, 3H), 1.85 (d, 3H).

c)[2-(3-Chloro-phenyl)-2H-tetrazol-5-ylmethyl]-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine

The title compound is obtained from methanesulfonic acid1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]-ethyl ester (1 mmol) usingsodium hydride (2 mmol) andmethyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine (1.8 mmol)in DMF (5 mL) at 60° C. overnight.

d){1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethyl}-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine

The title compound is obtained from methanesulfonic acid1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]-ethyl ester (1 mmol) usingsodium hydride (2 mmol) andmethyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine (1.8 mmol)in DMF (5 mL) at 60° C. overnight.

e)[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-ylmethyl]-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine

The title compound is obtained from methanesulfonic acid2-(2-fluoro-5-methyl-phenyl)-2H -tetrazol-5-ylmethyl ester1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]-ethyl ester (1 mmol) usingsodium hydride (2 mmol) andmethyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine (1.8 mmol)in DMF (5 mL) at 60° C. overnight.

f){1-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethyl}-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine

The title compound is obtained from methanesulfonic acid1-[2-(2-fluoro-5-methylphenyl)-2H -tetrazol-5-yl]-ethyl ester (1 mmol)sodium hydride (2 mmol) andmethyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine (1.8 mmol)in DMF (5 mL) at 60° C. overnight.

g)[2-(3-Iodo-phenyl)-2H-tetrazol-5-ylmethyl]-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine

The title compound is obtained from methanesulfonic acid2-(3-iodo-phenyl)-2H-tetrazol-5-ylmethyl ester (1 mmol) using sodiumhydride (2 mmol) andmethyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine (1.8 mmol)in DMF (5 mL) at 60° C. overnight.

h){1-[2-(3-Iodo-phenyl)-2H-tetrazol-5-yl]-ethyl}-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine

The title compound is obtained from methanesulfonic acid methanesulfonicacid 1-[2-(3-iodo-phenyl)-2H-tetrazol-5-yl]-ethyl ester (1 mmol) usingsodium hydride (2 mmol) andmethyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine (1.8 mmol)in DMF (5 mL) at 60° C. overnight.

i)Methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-(2-m-tolyl-2H-tetrazol-5-ylmethyl)-amine

The title compound (74%, yellow solid) was obtained from methanesulfonicacid 2-m-tolyl-2H -tetrazol-5-ylmethyl ester (1 mmol) using sodiumhydride (2 mmol) and3-Pyridin-4-yl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine (1.8mmol) in DMF (5 mL) at room temperature overnight. ¹HNMR CDCl₃: 8.72 (sbr, 2H), 7.92 (s, 1H), 7.90 (d, 1H), 7.63 (d, 2H), 7.42 (t, 1H), 7.30(d, 1H), 5.19 (s, 2H), 4.16 (t, 2H), 3.62 (t, 2H), 2.47 (s, 3H), 2.25(m, 2H).

j)Methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-[1-(2-m-tolyl-2H-tetrazol-5-yl)-ethyl]-amine

The title compound (89%, yellow-brown solid) was obtained frommethanesulfonic acid 1-(2-m-tolyl-2H-tetrazol-5-yl)-ethyl ester (1 mmol)using sodium hydride (2 mmol) and3-Pyridin-4-yl-5,6,7,8-tetrahydro-[1,2,4]thiazolo[4,3-a]pyrimidine (1.8mmol) in DMF (5 mL) at room temperature overnight. ¹HNMR CDCl₃: 8.71 (dof d, 2H), 7.92 (m, 2H), 7.62 (d of d, 2H), 7.42 (t, 1H), 7.29 (d, 1H),6.18 (q, 1H), 4.13 (m, 2H), 3.48 (m, 2H), 2.46 (s, 3H), 2.18 (m, 2H),1.84 (d, 3H).

k)[2-(3-Chloro-phenyl)-2H-tetrazol-5-ylmethyl]-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine

The title compound is obtained from methanesulfonic acid1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]-ethyl ester (1 mmol) usingsodium hydride (2 mmol) and 3-Pyridin-4-yl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine (1.8 mmol) in DMF (5 mL)at room temperature overnight.

I){1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethyl}-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine

The title compound (42.1 mg, 63%, yellow solid) was obtained frommethanesulfonic acid 1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]-ethyl ester(1 mmol) using sodium hydride (2 mmol) and3-Pyridin-4-yl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine (1.8mmol) in DMF (5 mL) at room temperature overnight. ¹HNMR CDCl₃: 8.72 (d,2H), 8.15 (s, 1H), 8.03 (m, 1H), 7.62 (d, 2H), 7.5 (t, 2H), 6.16 (q,1H), 4.12 (m, 2H), 3.5 (m, 2H), 2.2 (m, 2H), 1.84 (d, 3H)

m)[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-ylmethyl]-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine

The title compound is obtained from methanesulfonic acid2-(2-fluoro-5-methyl-phenyl)-2H -tetrazol-5-ylmethyl ester1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]-ethyl ester (1 mmol) usingsodium hydride (2 mmol) and3-Pyridin-4-yl-5,6,7,8-tetrahydro-[1,2,4]-triazolo[4,3-a]pyrimidine (1.8mmol) in DMF (5 mL) at room temperature overnight.

n){1-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethyl}-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine

The title compound is obtained from methanesulfonic acid1-[2-(2-fluoro-5-methylphenyl)-2H -tetrazol-5-yl]-ethyl ester (1 mmol)using sodium hydride (2 mmol) and3-Pyridin-4-yl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine (1.8mmol) in DMF (5 mL) at room temperature overnight.

o)8-[2-(3-Iodo-phenyl)-2H-tetrazol-5-ylmethyl]-3-pyridin-4-yl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine

The title compound is obtained from methanesulfonic acid2-(3-iodo-phenyl)-2H-tetrazol-5-ylmethyl ester (1 mmol) using sodiumhydride (2 mmol) and3-Pyridin-4-yl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine (1.8mmol) in DMF (5 mL) at room temperature overnight.

p)8-}1-[2-(3-Iodo-phenyl)-2H-tetrazol-5-yl]-ethyl}-3-pyridin-4-yl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine

The title compound is obtained from methanesulfonic acid1-[2-(3-iodo-phenyl)-2H-tetrazol-5-yl]-ethyl ester (1 mmol) using sodiumhydride (2 mmol) and 3-Pyridin-4-yl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine (1.8 mmol) in DMF (5 mL)at room temperature overnight.

q)3-Pyridin-4-yl-8-(2-m-tolyl-2H-tetrazol-5-ylmethyl)-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene

The title compound is obtained from methanesulfonic acid2-m-tolyl-2H-tetrazol-5-ylmethyl ester (1 mmol) using sodium hydride (2mmol) and 3-Pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene(1.8 mmol) in DMF (5 mL) at room temperature overnight.

r)3-Pyridin-4-yl-8-[1-(2-m-tolyl-2H-tetrazol-5-yl)-ethyl]-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene

The title compound is obtained from methanesulfonic acid1-(2-m-tolyl-2H-tetrazol-5-yl)ethyl ester (1 mmol) using sodium hydride(2 mmol) and3-Pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene (1.8mmol) in DMF (5 mL) at room temperature overnight.

s)8-[2-(3-Chloro-phenyl)-2H-tetrazol-5-ylmethyl]-3-pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene

The title compound (39.6 mg, 53%; orange solid) was obtained frommethanesulfonic acid 1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]-ethyl ester(1 mmol) using sodium hydride (2 mmol) and3-Pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene (1.8mmol) in DMF (5 mL) at room temperature overnight. ¹HNMR CDCl₃: 8.76 (d,2H), 8.17 (s, 1H), 8.05 (d, 1H), 7.51 (d, 4H), 5.08 (br, 2H), 4.07 (br,2H), 3.4 (br, 2H), 1.96 (br, 2H)

t)8-{1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethyl}-3-pyridin-4-yl-5,6,7,8-tetrahydro-4H-1-1,2,3a,8-tetraaza-azulene

The title compound is obtained from methanesulfonic acid1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]-methyl ester (1 mmol) usingsodium hydride (2 mmol) and 3-Pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene (1.8 mmol) in DMF (5 mL) atroom temperature overnight.

u)8-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-ylmethyl]-3-pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene

The title compound is obtained from methanesulfonic acid2-(2-fluoro-5-methyl-phenyl)-2H -tetrazol-5-ylmethyl ester1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]-ethyl ester (1 mmol) usingsodium hydride (2 mmol) and3-Pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene (1.8mmol) in DMF (5 mL) at room temperature overnight.

v)8-{[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethyl}-3-pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene

The title compound is obtained from methanesulfonic acid1-[2-(2-fluoro-5-methylphenyl)-2H -tetrazol-5-yl]-ethyl ester (1 mmol)using sodium hydride (2 mmol) and3-Pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene (1.8mmol) in DMF (5 mL) at room temperature overnight.

w)8-[2-(3-Iodo-phenyl)-2H-tetrazol-5-ylmethyl]-3-pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene

The title compound is obtained from methanesulfonic acid2-(3-iodo-phenyl)-2H-tetrazol-5-ylmethyl ester (1 mmol) using sodiumhydride (2 mmol) and3-Pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene (1.8mmol) in DMF (5 mL) at room temperature overnight.

x)8-{1-[2-(3-Iodo-phenyl)-2H-tetrazol-5-yl]-ethyl}-3-pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene

The title compound is obtained from methanesulfonic acid1-[2-(3-iodo-phenyl)-2H-tetrazol-5-yl]-ethyl ester (1 mmol) using sodiumhydride (2 mmol) and 3-Pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene (1.8 mmol) in DMF (5 mL) atroom temperature overnight.

y){1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethyl}-methyl-(4-methyl-5-pyridin-3-yl-4H-[1,2,4]triazol-3-yl)-amine

The title compound is obtained from methanesulfonic acid1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]-ethyl ester (1 mmol) usingsodium hydride (2 mmol) andmethyl-(4-methyl-5-pyridin-3-yl-4H-[1,2,4]triazol-3-yl)-amine (1.8 mmol)in DMF (5 mL) at room temperature overnight.

z){1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethyl}-[5-(3,5-difluoro-phenyl)-4-methyl-4H-[1,2,4]triazol-3-yl]-methyl-amine

The title compound is obtained from methanesulfonic acid1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]-ethyl ester (1 mmol) usingsodium hydride (2 mmol) and[5-(3,5-difluorophenyl)-4-methyl-4H-[1,2,4]triazol-3-yl]-methyl-amine(1.8 mmol) in DMF (5 mL) at room temperature overnight.

aa)8-{1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethyl}-3-pyridin-3-yl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine

The title compound is obtained from methanesulfonic acid1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]-ethyl ester (1 mmol) usingsodium hydride (2 mmol) and 3-pyridin-3-yl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine (1.8 mmol) in DMF (5 mL)at room temperature overnight.

ab)8-{1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethyl}-3-(3,5-difluoro-phenyl)-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine

The title compound is obtained from methanesulfonic acid1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]-ethyl ester (1 mmol) usingsodium hydride (2 mmol) and 3-(3,5-Difluorophenyl)-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine (1.8 mmol) in DMF (5 mL)at room temperature overnight.

ac)8-[2-(3-Chloro-phenyl)-2H-tetrazol-5-ylmethyl]-3-pyridin-3-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene

The title compound is obtained from5-bromomethyl-2-(3-chloro-phenyl)-2H-tetrazole (1 mmol) using sodiumhydride (2 mmol) and3-pyridin-3-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene (1.8mmol) in DMF (5 mL) at room temperature overnight.

ad)8-[2-(3-Chloro-phenyl)-2H-tetrazol-5-ylmethyl]-3-(3,5-difluoro-phenyl)-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene

The title compound is obtained from5-bromomethyl-2-(3-chloro-phenyl)-2H-tetrazole (1 mmol) using sodiumhydride (2 mmol) and 3-(3,5-Difluoro-phenyl)-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene (1.8 mmol) in DMF (5 mL) at room temperatureovernight.

In a similar manner, the following compounds were prepared:

ae)8-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}-3-(3,5-difluorophenyl)-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrimidine;yield 40.4 mg, 55%, light yellow solid; ¹H NMR CDCl₃: 8.15 (s, 1H), 8.03(m, 1H), 7.5 (m, 2H), 7.25 (m, 2H), 6.89 (m, 1H), 6.16 (q, 1H), 4.07 (m,2H), 3.48 (m, 2H), 2.2 (m, 2H), 1.83 (d, 3H)

af)8-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}-3-(4-methoxyphenyl)-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrimidine;yield 40.2 mg, 56%, yellow oil; ¹H NMR CDCl₃: 8.15 (s, 1H), 8.04 (m,1H), 7.6 (d, 2H), 7.55 (d, 2H), 6.98 (d, 2H), 6.16 (q, 1H), 3.97 (t,2H), 3.86 (s, 3H), 3.46 (m, 2H), 2.13 (m, 2H), 1.82 (d, 3H)

ag)3-(2-chloro-6-methoxypyridin-4-yl)-8-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrimidine;yield 47.5 mg, 61%, yellow oil; ¹HNMR CDCl₃: 8.15 (s, 1H), 8.04 (m, 1H),7.5 (m, 2H), 7.47 (s, 1H), 6.92 (s, 1H), 6.17 (q, 1H), 4.09 (m, 2H),3.98 (s, 3H), 3.49 (m, 2H), 2.18 (m, 2H), 1.85 (d, 3H)

ah)8-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}-3-(2-methoxypyridin-4-yl)-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrimidine; yield 167.3 mg, 77%,yellow solid; ¹HNMR CDCl₃: 8.25 (d, 1H), 8.14 (s, 1H), 8.02 (m, 1H),7.48 (m, 2H), 7.28 (d, 1H), 6.98 (s, 1H), 6.16 (q, 1H), 4.1 (m, 2H),3.97 (s, 3H), 3.49 (m, 2H), 2.19 (m, 2H), 1.82 (d, 3H)

ai)8-{[2-(3-chlorophenyl)-2H-tetrazol-5-yl]methyl}-3-(2-methoxypyridin-4-yl)-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrimidine;yield 108.2 mg, 59%, orange solid; ¹H NMR CDCl₃: 8.26 (d, 1H), 8.24 (s,1H), 8.15 (m, 1H), 7.48 (m, 2H), 7.28 (m, 1H), 6.98 (s, 1H), 5.18 (s,2H), 4.13 (t, 2H), 3.98 (s, 3H), 3.61 (t, 2H), 2.25 (m, 2H)

aj)3-(5-{[3-(2-methoxypyridin-4-yl)-6,7-dihydro[1,2,4]triazolo[4,3-a]pyrimidine-8(5H)-yl]methyl}-2H-tetrazol-2-yl)benzonitrile;yield 115.6 mg, 64%, yellow foam; ¹H NMR CDCl₃: 8.42 (m, 2H), 8.24 (d,1H), 7.7 (m, 2H), 7.25 (t, 1H), 6.97 (s, 1H), 5.18 (s, 2H), 4.12 (m,2H), 3.97 (s, 3H), 3.63 (t, 2H), 2.24 (m, 2H)

ak)3-(2-methoxypyridin-4-yl)-8-{1-[2-(3-iodophenyl)-2H-tetrazol-5-yl]ethyl}-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrimidine;yield 220 mg, 51%, yellow foam; ¹H NMR CDCl₃: 8.42 (br, 1H), 8.2 (d,1H), 8.04 (d, 1H), 7.77 (d, 1H), 7.27 (m, 2H), 6.95 (s, 1H), 6.13 (m,1H), 4.06 (t, 2H), 3.93 (d, 3H), 3.44 (m, 2H), 2.15 (br, 2H), 1.79 (d,3H)

al)3-(5-{1-[3-(2-methoxypyridin-4-yl)-6,7-dihydro[1,2,4]triazolo[4,3-a]pyrimidin-8(5H)-yl]ethyl}-2H-tetrazol-2-yl)benzonitrile;yield 87.8 mg, 58%, off white solid; ¹H NMR CDCl₃: 8.44 (s, 1H), 8.37(d, 1H), 8.26 (d, 1H), 7.77 (m, 2H), 7.29 (m, 1H), 6.98 (s, 1H), 6.18(q, 1H), 4.12 (m, 2H), 3.98 (s, 3H), 3.52 (m, 2H), 2.19 (m, 2H), 1.85(d, 3H)

am)3-(5-{[3-(2-methoxypyridin-4-yl)-5,6,7,8-tetrahydro-9H-[1,2,4]triazolo[4,3-α][1,3]diazepin-9-yl]methyl}-2H-tetrazol-2-yl)benzonitrile;yield 32%; ¹H NMR CDCl₃: 8.44 (s, 1H), 8.40 (d, 1H), 8.26 (d, 1H), 7.76(d, 1H), 7.68 (t, 1H), 7.08 (d, 1H), 6.88 (s, 1H), 5.05 (s, 2H), 3.97(s, 3H), 3.94 (m, 2H), 3.39 (m, 2H), 1.93 (m, 2H).

an)3-(5-{[3-(2,6-dimethoxypyrimidin-4-yl)-6,7-dihydro[1,2,4]triazolo[4,3-α]pyrimidin-8(5H)-yl]methyl}-2H-tetrazol-2-yl)benzonitrile;yield 67% ¹H NMR (dmso-d₆): 8.50 (br s, 1H), 8.36 (d, 1H), 8.04 (d, 1H),7.83 (dd, 1H), 6.96 (s, 1H), 5.06 (s, 2H), 4.44 (t, 2H), 3.91 (s, 3H),3.88 (s, 3H), 3.49 (m, 2H), 2.10 (m, 2H).

EXAMPLE 27 a)4-(5-{[2-(3-chlorophenyl)-2H-tetrazol-5-yl]methoxy}-4-methyl-4H-1,2,4-triazol-3-yl)pyridine

Sodium hydride (7.5 mg, 0.187 mmol) was added to a vial containing[2-(3-chlorophenyl)-2H -tetrazol-5-yl]-methanol (32.9 mg, 0.156 mmol)and dimethylformamide (3 mL). The reaction was allowed to stir forforty-five minutes. The vial was then capped and heated at 80° C.overnight. After cooling, water was added and an aqueous workup was doneextracting with ethyl acetate three times. The combined organic layerswere washed with brine, dried over sodium sulfate, filtered andconcentrated. The crude product was purified by column chromatography(5% methanol in dichloromethane) to yield the title compound as a whitesolid (21.6 mg, 38%). ¹H NMR (CDCl₃) δ (ppm): 8.79 (d, 2H), 8.22 (s,1H), 8.09 (m, 1H), 7.64 (m, 2H), 7.54 (m, 2H), 5.96 (s, 2H), 3.64(s,3H).

Examples 27b to 27r may be prepared as described for example 27a.

b)4-(5-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethoxy}-4-methyl-4H-1,2,4-triazol-3-yl)pyridine

The title compound (44.0 mg, 48%, clear oil) was prepared from1-[2-(3-chloro-phenyl)-2H -tetrazol-5-yl-ethanol (54.3 mg, 0.242 mmol),sodium hydride (12.0 mg, 0.29 mmol) and4-(5-methanesulfonyl-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine (69.1 mg,0.29 mmol). ¹HNMR (CDCl₃) δ (ppm): 8.75 (m, 2H), 8.16 (m, 1H), 8.04 (m,1H), 7.61 (m, 2H), 7.49 (m, 2H), 6.59 (q, 1H), 3.63 (s, 3H), 2.04 (d,3H).

c)4-[4-Methyl-5-(2-m-tolyl-2H-tetrazol-5-ylmethoxy)-4H-[1,2,4]triazol-3-yl]-pyridine

The title compound (23.6 mg, 52%, white solid) was prepared from(2-m-tolyl-2H-tetrazol-5-yl)-methanol (24.8 mg, 0.13 mmol), sodiumhydride (8 mg, 0.2 mmol) and4-(5-methanesulfonyl-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine (38 mg,0.16 mmol). The product was purified by chromatography using a silicaSPE tube (2.5-5% methanol in dichloromethane, desired product was secondproduct eluting). ¹H NMR (CDCl₃) δ (ppm): 8.78 (m, 2H), 7.98 (s, 1H),7.97 (d, 1H), 7.64 (d, 2H), 7.46 (t, 1H), 7.34 (d, 1H), 5.94 (s, 2H),3.63 (s, 3H), 2.50 (s, 3H).

d)4-{4-Methyl-5-[1-(2-m-tolyl-2H-tetrazol-5-yl)-ethoxy]-4H-[1,2,4]triazol-3-yl}-pyridine

The title compound (70 mg, 79%, off-white solid) was prepared from1-(2-m-tolyl-2H-tetrazol-5-yl)-ethanol (50.3 mg, 0.24 mmol), sodiumhydride (16 mg, 0.4 mmol) and4-(5-methanesulfonyl-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine (70.2 mg,0.30 mmol). The product was purified by chromatography using a silicaSPE tube (2.5-4% methanol in dichloromethane). ¹H NMR (CDCl₃) δ (ppm):8.76 (br.d, 2H), 7.95 (s, 1H), 7.94 (d, 1H), 7.62 (d, 2H), 7.44 (t, 1H),7.32 (d, 1H), 6.61 (q, 1H), 3.63 (s, 3H), 2.28 (s, 3H), 2.04 (d, 3H).

e)4-{5-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-ylmethoxy]-4-methyl-4H-[1,2,4]triazol-3-yl}-pyridine

The title compound is prepared from[2-(2-fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-methanol (1 mmol),sodium hydride (1.5 mmol) and4-(5-methanesulfonyl-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine (1.25mmol).

f)4-(5-{1-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine

The title compound is prepared from1-[2-(2-fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethanol (1 mmol),sodium hydride (1.5 mmol) and4-(5-methanesulfonyl-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine (1.25mmol).

g)4-{5-[2-(3-Chloro-phenyl)-2H-tetrazol-5-ylmethoxy]-4-cyclopropyl-4H-[1,2,4]triazol-3-yl}-pyridine

The title compound is prepared from[2-(3-chloro-phenyl)-2H-tetrazol-5-yl]-methanol (1 mmol), sodium hydride(1.5 mmol) and4-(4-cyclopropyl-5-methanesulfonyl-4H-[1,2,4]triazol-3-yl)-pyridine(1.25 mmol).

h)4-(5-{1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4-cyclopropyl-4H-[1,2,4]triazol-3-yl)-pyridine

The title compound is prepared from1-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl-ethanol (1 mmol), sodium hydride(1.5 mmol)4-(4-cyclopropyl-5-methanesulfonyl-4H-[1,2,4]triazol-3-yl)-pyridine(1.25 mmol).

i)4-[4-Cyclopropyl-5-(2-m-tolyl-2H-tetrazol-5-ylmethoxy)-4H-[1,2,4]triazol-3-yl]-pyridine

The title compound (4.6 mg, 11%, yellow solid) was prepared from(2-m-tolyl-2H-tetrazol-5-yl)-methanol (1 mmol), sodium hydride (1.5mmol) and4-(4-cyclopropyl-5-methanesulfonyl-4H-[1,2,4]triazol-3-yl)-pyridine(1.25 mmol). ¹H NMR (CDCl₃) δ (ppm): 8.77 (s br, 2H), 7.97 (m, 2H), 7.79(d, 2H), 7.47 (t, 1H), 7.35 (d, 1H), 5.94 (s, 2H), 3.21 (m, 1H), 2.50(s, 3H), 1.12 (m, 2H), 0.86 (m, 2H).

j)4-{4-Cyclopropyl-5-[1-(2-m-tolyl-2H-tetrazol-5-yl)-ethoxy]-4H-[1,2,4]triazol-3-yl}-pyridine

The title compound (7.8 mg, 19%, clear oil) was prepared from1-(2-m-tolyl-2H-tetrazol-5-yl)-ethanol (1 mmol), sodium hydride (1.5mmol) and4-(4-cyclopropyl-5-methanesulfonyl-4H-[1,2,4]triazol-3-yl)-pyridine(1.25 mmol). ¹H NMR (CDCl₃) δ (ppm): 8.73 (d, 2H), 7.93 (m, 2H), 7.78(d, 2H), 7.45 (t, 1H), 7.33 (d, 1H), 6.62 (q, 1H), 3.22 (m, 1H), 2.49(s, 3H), 2.05 (d, 3H), 1.14 (m, 2H), 1.00 (m, 2H).

k)4-{4-Cyclopropyl-5-[2-(2-fluoro-5-methyl-phenyl)-2H-tetrazol-5-ylmethoxy]-4H-[1,2,4]triazol-3-yl}-pyridine

The title compound is prepared from[2-(2-fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-methanol (1 mmol),sodium hydride (1.5 mmol) and4-(4-cyclopropyl-5-methanesulfonyl-4H-[1,2,4]triazol-3-yl)-pyridine(1.25 mmol).

l)4-(4-Cyclopropyl-5-{1-[2-(2-fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4H-[1,2,4]triazol-3-yl)-pyridine

The title compound is prepared from1-[2-(2-fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethanol (1 mmol),sodium hydride (1.5 mmol) and4-(4-cyclopropyl-5-methanesulfonyl-4H-[1,2,4]triazol-3-yl)-pyridine(1.25 mmol).

m)4-{5-[2-(3-Iodo-phenyl)-2H-tetrazol-5-ylmethoxy]-4-methyl-4H-[1,2,4]triazol-3-yl}-pyridine

The title compound is prepared from[2-(3-iodo-phenyl)-2H-tetrazol-5-yl]-methanol (1 mmol), sodium hydride(1.5 mmol) and4-(5-methanesulfonyl-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine (1.25mmol).

n)4-(5-{1-[2-(3-Iodo-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine

The title compound is prepared from1-[2-(3-iodo-phenyl)-2H-tetrazol-5-yl-ethanol (1 mmol), sodium hydride(1.5 mmol)4-(5-methanesulfonyl-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine (1.25mmol).

o)4-{4-Cyclopropyl-5-[2-(3-iodo-phenyl)-2H-tetrazol-5-ylmethoxy]-4H-[1,2,4]triazol-3-yl}-pyridine

The title compound is prepared from[2-(3-iodo-phenyl)-2H-tetrazol-5-yl]-methanol (1 mmol), sodium hydride(1.5 mmol) and4-(4-cyclopropyl-5-methanesulfonyl-4H-[1,2,4]triazol-3-yl)-pyridine(1.25 mmol).

p)4-(4-Cyclopropyl-5-{1-[2-(3-iodo-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4H-[1,2,4]triazol-3-yl)-pyridine

The title compound is prepared from1-[2-(3-iodo-phenyl)-2H-tetrazol-5-yl-ethanol (1 mmol), sodium hydride(1.5 mmol)4-(4-cyclopropyl-5-methanesulfonyl-4H-[1,2,4]triazol-3-yl)-pyridine(1.25 mmol).

q)3-(5-{1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine

The title compound is prepared from1-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl-ethanol (1 mmol), sodium hydride(1.5 mmol), and3-(5-methanesulfonyl-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine (1.25mmol).

r)2-(3-Chloro-phenyl)-5-{1-[5-(3,5-difluoro-phenyl)-4-methyl-4H-[1,2,4]triazol-3-yloxy]-ethyl}-2H-tetrazole

The title compound is prepared from1-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl-ethanol (1 mmol), sodium hydride(1.5 mmol), and3-(3,5-Difluoro-phenyl)-5-methanesulfonyl-4-methyl-4H-[1,2,4]triazole(1.25 mmol).

EXAMPLE 28 a)3-[5-(4-Methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yloxymethyl)-tetrazol-2-yl]-benzonitrile

The title compound is prepared from4-{5-[2-(3-iodo-phenyl)-2H-tetrazol-5-ylmethoxy]-4-methyl-4H-[1,2,4]triazol-3-yl}-pyridine(1 mmol), zinc cyanide (1.1 mmol), palladium (0)tetrakis-triphenylphosphine (0.05 mmol) in DMF (5 mL) at 80° C.overnight. The solvent is removed in vacuo, and the product is purifiedby flash chromatography.

Examples 28b to 28j were prepared as described for example 28a.

b)3-[(5-[1-(4-Methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yloxy)-ethyl]-tetrazol-2-yl}-benzonitrile

The title compound is prepared from4-(5-{1-[2-(3-iodo-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine(1 mmol), zinc cyanide (1.1 mmol), palladium (0)tetrakis-triphenylphosphine (0.05 mmol) in DMF (5 mL) at 80° C.overnight.

c)3-[5-(4-Cyclopropyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yloxymethyl)-tetrazol-2-yl]-benzonitrile

The title compound is prepared from4-{4-cyclopropyl-5-[2-(3-iodo-phenyl)-2H-tetrazol-5-ylmethoxy]-4H-[1,2,4]triazol-3-yl}-pyridine(1 mmol), zinc cyanide (1.1 mmol), palladium (0)tetrakis-triphenylphosphine (0.05 mmol) in DMF (5 mL) at 80° C.overnight.

d)3-{5-[1-(4-Cyclopropyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yloxy)-ethyl]-tetrazol-2-yl}-benzonitrile

The title compound is prepared from4-(4-cyclopropyl-5-{1-[2-(3-iodo-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4H-[1,2,4]triazol-3-yl)-pyridine(1 mmol), zinc cyanide (1.1 mmol), palladium (0)tetrakis-triphenylphosphine (0.05 mmol) in DMF (5 mL) at 80° C.overnight.

e)3-(5-{[Methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amino]-methyl}-tetrazol-2-yl)-benzonitrile

The title compound is prepared from[2-(3-Iodo-phenyl)-2H-tetrazol-5-ylmethyl]-methyl(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine(1 mmol), zinc cyanide (1.1 mmol), palladium (0)tetrakis-triphenylphosphine (0.05 mmol) in DMF (5 mL) at 80° C.overnight.

f)3-(5-{1-[Methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amino]-ethyl}-tetrazol-2-yl)-benzonitrile

The title compound is prepared from{1-[2-(3-Iodo-phenyl)-2H-tetrazol-5-yl]-ethyl}-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine(1 mmol), zinc cyanide (1.1 mmol), palladium (0)tetrakis-triphenylphosphine (0.05 mmol) in DMF (5 mL) at 80° C.overnight.

g)3-[5-(3-Pyridin-4-yl-6,7-dihydro-5H-[1,2,4]triazolo[4,3-a]pyrimidin-8-ylmethyl)tetrazol-2-yl]-benzonitrile

The title compound is prepared from8-[2-(3-iodo-phenyl)-2H-tetrazol-5-ylmethyl]-3-pyridin-4-yl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine(1 mmol), zinc cyanide (1.1 mmol), palladium (0)tetrakis-triphenylphosphine (0.05 mmol) in DMF (5 mL) at 80° C.overnight.

h)3-{5-[1-(3-Pyridin-4-yl-6,7-dihydro-5H-[1,2,4]triazolo[4,3-a]pyrimidin-8-yl)-ethyl]-tetrazol-2-yl}-benzonitrile

The title compound is prepared from8-{1-[2-(3-iodo-phenyl)-2H-tetrazol-5-yl]-ethyl}-3-pyridin-4-yl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine(1 mmol), zinc cyanide (1.1 mmol), palladium (0)tetrakis-triphenylphosphine (0.05 mmol) in DMF (5 mL) at 80° C.overnight.

i)3-[5-(3-Pyridin-4-yl-4,5,6,7-tetrahydro-1,2,3a,8-tetraaza-azulen-8-ylmethyl)tetrazol-2-yl]-benzonitrile

The title compound is prepared from8-[2-(3-iodo-phenyl)-2H-tetrazol-5-ylmethyl]-3-pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene(1 mmol), zinc cyanide (1.1 mmol), palladium (0)tetrakis-triphenylphosphine (0.05 mmol) in DMF (5 mL) at 80° C.overnight.

j)3-{5-[1-(3-Pyridin-4-yl-4,5,6,7-tetrahydro-1,2,3a,8-tetraaza-azulen-8-yl)-ethyl]-tetrazol-2-yl}-benzonitrile

The title compound is prepared from8-{1-[2-(3-iodo-phenyl)-2H-tetrazol-5-yl]-ethyl}-3-pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene(1 mmol), zinc cyanide (1.1 mmol), palladium (0)tetrakis-triphenylphosphine (0.05 mmol) in DMF (5 mL) at 80° C.overnight.

EXAMPLE 29 a1) & a2) (R) &(S)-4-(5-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethoxy}-4-methyl-4H-1,2,4-triazol-3-yl)pyridine

The racemic mixture of4-(5-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethoxy}-4-methyl-4H-1,2,4-triazol-3-yl)pyridinewas separated with a chiralpak AD column (4.6×250) using 50% isopropanoland 50% ethanol and a flow rate of 2.0 mL/minute. The first enantiomer(15.6 mg) had a retention time of 6.10 minutes and the second enantiomer(9.5 mg) had a retention time of 11.97 minutes.

In a similar manner, the following compounds were prepared:

b1) & b2) (R) and (S)3-(5-{1-[3-(2-methoxypyridin-4-yl)-6,7-dihydro[1,2,4]triazolo[4,3-a]pyrimidin-8(5H)-yl]ethyl}-2H-tetrazol-2-yl)benzonitrile

HPLC conditions: Chiralpak AD; 39° C.; iPrOH; 4.6×250 mm; 1 mL/min;Rt=6.93 min (b1), 11.93 min (b2); semi-prep 21×250 mm @ 20 mL/min.;yield 19.3 mg b1 and 18.5 mg b2

c1) & c2) (R) and (S) ethyl4-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazine-1-carboxylate

HPLC conditions: Chiralpak AD; semi-prep 21×250 mm @ 20 mL/min with50:50 iPrOH/hexane; Rt=22 min (E1), 42.5 min (E2); 16 mg E1 and 14 mg E2

d1) & d2) (R) and (S) ethyl4-{1-[2-(5-chloro-2-fluorophenyl)-2H-tetrazol-5-yl]ethyl}piperazine-1-carboxylate

HPLC conditions: Chiralpak AD; EtOH; 4.6×250 mm; 1 mL/min; Rt=6.1 min(E1), 6.7 min (E2); semi-prep 21×250 mm @ 20 mL/min with 70:30EtOH/hexane->5 mg E1 and 6 mg E2

e1) & e2) (R) and (S)6-(4-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazin-1-yl)nicotinonitrile

HPLC conditions: Chiralpak AD; 39° C.; MeOH; 4.6×250 mm; 2 mL/min;Rt=14.3 min (e1), 34.8 min (e2); semi-prep 21×250 mm @ 20 mL/min.; yielde1: 37.8 mg white solid; e2: 37 mg white solid

f1) & f2) (R) and (S)3-(4-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazin-1-yl)pyrazine-2-carbonitrile

Chiralpak AD; 39° C.; MeOH; 4.6×250 mm; 2 mL/min; Rt=10.9 min (f1), 17.4min ([2]; semi-prep 21×250 mm @ 20 mL/min.; yield f1: 29.2 mg viscousyellow oil; f2: 28.7 mg viscous yellow oil

EXAMPLE 30 a)2-(3-chloro-phenyl)-5-[(triphenyl-λ⁵-phosphanyl)-methyl]-2H-tetrazolehydrobromide

Triphenylphosphine (89.4 mg, 0.341 mmol) was added to5-bromomethyl-2-(3-chlorophenyl)-2H -tetrazole (93.2 mg, 0.341 mmol) intoluene (5 mL). The reaction was heated at 80° C. under Argon for 4.5hours. The reaction was cooled and concentrated to yield the titlecompound as a white solid (165.1 mg, 90%). ¹H NMR CDCl₃ δ (ppm): 7.96(m, 6H), 7.80 (m, 4H), 7.70 (m, 6H), 7.44 (d, 2H), 7.28 (s, 1H), 6.17(d, 2H).

b)4-(5-{2-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl]-vinyl}-4-ethyl-4H-[1,2,4]triazol-3-yl)pyridine

4-Ethyl-5-pyridin-4-yl-4H-[1,2,4]triazole-3-carbaldehyde (56.4 mg, 0.279mmol) was dissolved in dimethylformamide (2 mL) and added to a vialcontaining2-(3-chloro-phenyl)-5-[(triphenyl-λ⁵-phosphanyl)-methyl]-2H-tetrazolehydrobromide (165.1 mg, 0.307 mmol) dissolved in dimethylformamide (2mL). After addition of DBU (84.9 mg, 0.558 mmol), the vial was cappedand the reaction was allowed to stir at room temperature for two hours.It was then heated at 80° C. for 1.5 hours. After cooling, water wasadded and an aqueous workup was done extracting with ethyl acetate threetimes. The combined organic layers were washed with water twice, brine,dried over sodium sulfate, filtered and concentrated. The crude productwas purified by an SPE tube (5% MeOH/CH₂Cl₂) to yield the title compoundas a white solid. ¹H NMR (CDCl₃) δ (ppm): 8.84 (d, 2H), 8.22 (m, 1H),8.10 (d of t, 1H), 8.04 (d, 1H), 7.67 (d, 1H), 7.64 (m, 2H), 7.51 (m,2H), 4.27 (q, 2H), 1.51 (t, 3H).

c)4-(5-{2-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl]-vinyl}-4-ethyl-4H-[1,2,4]triazol-3-yl)pyridine

The title compound is obtained from4-(5-{2-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl]-vinyl}-4-ethyl-4H-[1,2,4]triazol-3-yl)-pyridine(1 mmol) by reduction of the olefin.

d)1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-2-(4-cyclopropyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-ethanol

The title compound is obtained from2-(3-chloro-phenyl)-2H-tetrazole-5-carbaldehyde (1 mmol) by addition ofthe Grignard reagent formed from magnesium and4-(5-bromomethyl-4-cyclopropyl-4H-[1,2,4]triazol-3-yl)-pyridine.

e)2-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-1-(4-cyclopropyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-ethanol

The title compound is obtained from4-cyclopropyl-5-pyridin-4-yl-4H-[1,2,4]triazole-3-carbaldehyde (1 mmol)by addition of the Grignard reagent formed from magnesium and5-bromomethyl-2-(3-chloro-phenyl)-2H-tetrazole.

f)4-(5-{2-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl]-vinyl}-4-ethyl-4H-[1,2,4]triazol-3-yl)pyridine

The title compound is obtained from1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-2-(4-cyclopropyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-ethanol(1 mmol) or 2-[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]-1-(4-cyclopropyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-ethanol(1 mmol) using triethylsilane (mmol) and trifluoroacetic acid (mL) indichloromethane (mL).

g)3-(5-{2-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-propyl}-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine

The title compound is obtained analogously to the sequence used for2-(3-chloro-phenyl)-5-[(triphenyl-λ⁵-phosphanyl)-methyl]-2H-tetrazolehydrobromide (example 30a),4-(5-{2-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl]-vinyl}-4-ethyl-4H-[1,2,4]triazol-3-yl)-pyridine(example 30b), and4-(5-{2-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl]-vinyl}-4-ethyl-4H[1,2,4]-triazol-3-yl)-pyridine(example 30c), by starting from5-(1-bromo-ethyl)-2-(3-chloro-phenyl)-2H-tetrazole as a precursor to thephosphonium salt and4-methyl-5-pyridin-3-yl-4H-[1,2,4]triazole-3-carbaldehyde as thealdehyde this is reacted with.

h)2-(3-Chloro-phenyl)-5-{2-[5-(3,5-difluoro-phenyl)-4-methyl-4H-[1,2,4]triazol-3-yl]-1-methyl-ethyl}-2H-tetrazole

The title compound is obtained analogously to the sequence used for2-(3-chloro-phenyl)-5-[(triphenyl-λ⁵-phosphanyl)-methyl]-2H-tetrazolehydrobromide (example 30a),4-(5-{2-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl]-vinyl}-4-ethyl-4H-[1,2,4]triazol-3-yl)-pyridine(example 30b), and4-(5-{2-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl]-vinyl}-4-ethyl-4H-[1,2,4]triazol-3-yl)-pyridine(example 30c), by starting from5-(1-bromo-ethyl)-2-(3-chloro-phenyl)-2H-tetrazole as a precursor to thephosphoniumsalt and5-(3,5-Difluorophenyl)-4-methyl-4H-[1,2,4]triazole-3-carbaldehyde as thealdehyde this is reacted with.

EXAMPLE 31

General Procedure for Tetrahydro-Triazolo-Pyrimidine Synthesis:

Pyridine (˜0.5 mL/mmol) was added to acid chloride. The aryl hydrazide(1 equivalent) was then added and the reaction mixture was heated at130° C. over night. The solution was basified using potassium carbonateand the product was partitioned between ethyl acetate and water, and theorganic layer washed with brine, dried over anhydrous sodium sulfate,filtered and concentrated. An SPE or Flash column was run using a 10-20%MeOH:EtOAc solvent system. The eluting fractions were collected andconcentrated.

The following aminotriazoles were formed in this way:

a)3-(3,5-difluorophenyl)-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrimidine;yield 418 mg (42.8%); white solid; ¹HNMR CDCl₃ δ: 7.26 (d, 2H), 6.9 (t,1H), 4.1 (t, 2H), 3.52 (t, 2H), 2.13 (m, 2H).

b)3-(4-methoxyphenyl)-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrimidine;yield 76.4 mg (8.0%); white solid; ¹HNMR CDCl₃ δ: 7.60 (d, 2H), 7.00 (d,2H), 5.6 (br, 1H), 4.01 (t, 2H), 3.88 (s, 3H), 3.49 (m, 2H), 2.10 (m,2H).

c)3-(2-chloro-6-methoxypyridin-4-yl)-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrimidine;yield 400 mg (36.5%); white solid; ¹HNMR CDCl₃ δ: 7.34 (s, 1H), 6.93 (s,1H), 5.60(br, 1H), 4.112(t, 2H), 3.98(s, 3H), 3.52 (m, 2H), 2.15 (m,2H).

EXAMPLE 32 a)3-(2-methoxypyridin-4-yl)-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrimidine

3-(2-Chloro-6-methoxy-pyridin-4-yl)-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine(200 mg) and palladium on carbon (10%, 100 mg) were combined and EtOH(3.2 mL) and triethylamine (0.6 mL) were added. The reaction mixture wasstirred under an atmosphere of hydrogen at room temperature overnight,and then filtered through celite. Chromatography (silica, 10% 1 M N₃MeOH in DCM) yielded the product (white solid, 163 mg, 75%). ¹H-NMR(CDCl₃), δ (ppm): 8.27 (d, 1H), 7.28 (m, 1H), 6.99 (s, 1H), 6.05 (br,1H), 4.14 (t, 2H), 4.1 (s, 3H), 3.6 (t, 2H), 2.1 (m, 2H)

b)3-(2-methoxypyridin-4-yl)-6,7,8,9-tetrahydro-5H-[1,2,4]triazolo[4,3-a][1,3]diazepine

The title compound was synthesized in quantitative yield in a similarfashion. 1H-NMR (CDCl₃), δ (ppm): 8.33 (d, 1H), 7.18 (d, 1H), 7.03 (s,1H), 4.06 (t, 2H), 3.58 (q, 2H), 2.02 (m, 4H).

EXAMPLE 33 3-[5-(3-chlorophenyl)-2H-tetrazol-2-yl]-N-methylbutanamide

a)2-(3-{[tert-butyl(dimethyl)silyl]oxy}-1-methylpropyl)-5-(3-chlorophenyl)-2H-tetrazoleTo triphenylphosphine (2.6 g, 10 mmol) in THF (50 mL) at 0° C. underargon, DEAD (1.6 mL, 10 mmol) added during 5 minutes. After stirring for40 minutes at 0° C. 5-(3-chlorophenyl)-2H-tetrazole (0.90 g, 5 mmol)followed by a solution of 4-{[tert-butyl(dimethyl)silyl]oxy}butan-2-ol(1.53 g, 7.5 mmol) (Tett. 2003, 59, 4739-4748) in THF (5 mL) was added.Stirring at 0° C. for 10 minutes was followed by 21 h at r.t. Themixture was concentrated and purified by flash column chromatography(SiO₂, Heptane-EtOAc 7:1) to give 1.8 g (98%) of the title compound.

1H NMR: −0.01 (s, 6H), 0.87 (s, 9H), 1.67 (d, 3H), 2.11 (m, 1H), 2.35(m, 1H), 3.46 (m, 1H), 3.65 (m, 1H), 5.25 (m, 1H), 7.41 (m, 21H), 8.04(m, 1H), 8.15 (m, 1H)

b) 3-[5-(3-chlorophenyl)-2H-tetrazol-2-yl]butan-1-ol

TBAF was added to a solution of2-(3-{[tert-butyl(dimethyl)silyl]oxy}-1-methylpropyl)-5-(3-chlorophenyl)-2H-tetrazolein THF (25 mL). The mixture was concentrated after 4 h and the crude waspurified by flash column chromatography (SiO₂, Heptane-EtOAc 1:1) togive 0.90 g (91%) of the title compound. ¹HNMR: 1.72 (d, 3H), 1.97 (t,1H), 2.19 (m, 1H), 2.35 (m, 1H), 3.50 (m, 1H), 3.70 (m, 1H), 5.29 (m,1H), 7.43 (m, 2H), 8.04 (m, 1H), 8.14 (s, 1H)

c) 3-[5-(3-chlorophenyl)-2H-tetrazol-2-yl]butanoic acid

A mixture of CrO₃ (0.46 g, 4.63 mmol), H₂O (2.5 mL) and concentratedH₂SO₄ (0.46 mL) was added to a solution of3-[5-(3-chlorophenyl)-2H-tetrazol-2-yl]butan-1-ol (0.9 g, 3.6 mmol) inacetone (30 mL) at 0° C. The reaction was stirred at r.t. for 1.5 h.2-Propanol was added and the mixture was concentrated. Sat. NaCl (25 mL)and EtOAc (50 mL) were added to the residue and the mixture wasextracted. The water phase was re-extracted with EtOAc (50 mL) and thecombined organic phases were dried (MgSO₄) and concentrated to give 0.95g (100%) of the title compound. ¹HNMR (MeOH): 1.60 (d, 3H), 2.94 (dd,1H), 3.16 (dd, 1H), 5.34 (m, 1H), 7.39 (m, 2H), 7.91 (m, 1H), 7.97 (m,1H);

d) 3-[5-(3-chlorophenyl)-2H-tetrazol-2-yl]-N-methylbutananamide

Oxalylchloride (2 mL, 3.9 mmol) was added during 5 minutes to3-[5-(3-chlorophenyl)-2H -tetrazol-2-yl]butanoic acid in DCM (40 mL) andDMF (5 drops) under argon. The mixture was stirred at r.t. for 3 h andthen was MeNH₂ (2M in THF, 3.6 mL, 7.2 mmol) added and the resultingmixture was stirred o.n. Saturated NaHCO₃ (75 mL) was added and themixture was extracted with CHCl₃ (3×100 mL). The combined organic phaseswere dried (MgSO₄) and concentrated. The crude was purified by flashcolumn chromatography (SiO₂, Heptane-EtOAc 1:2) to give 0.74 g (74%) ofthe title compound. ¹H NMR: 1.71 (d, 3H), 2.78 (d, 3H), 2.82 (dd, 1H),5.53 (q, 1H), 5.87 (br. s., 1H), 7.42 (m, 2H), 8.01 (m, 1H), 8.12 (s,1H);

EXAMPLE 34 3-[4-methyl-5-(methylsulfonyl)-4H-1,2,4-triazol-3-yl]pyridinea) 4-methyl-5-pyridin-3-yl-2,4-dihydro-3H-1,2,4-triazole-3-thione

Nicotinohydrazide (10 g, 73 mmol) and methyl isothiocyanate (5.6 g, 76mmol) were mixed in 2-propanol (150 ml) and heated to 70° C. o.n. Thereaction was cooled to r.t. and evaporated to dryness. H₂O (180 mL) andNaHCO₃ (12.8 g, 152 mmol) were added to the residue and the mixture wasrefluxed o.n. The reaction mixture was cooled to r.t., acidified withconcentrated HCl and the title compound, 13.1 g (93%), was collected byfiltration. LC-MS (M⁺+1): 193

b) 3-[4-methyl-5-(methylthio)-4H-1,2,4-triazol-3-yl]pyridine

MeI (2 mL, 32 mmol) in EtOH (10 mL) was added to a mixture of4-methyl-5-pyridin-3-yl-2,4-dihydro-3H-1,2,4-triazole-3-thione in 1 MNaOH (70 mL, 70 mmol). After 1 h stirring at r.t., DCM was added and thelayers were separated. The water phase washed with DCM and the combinedorganic phases were dried and concentrated to give 6.5 g (98%) of thetitle compound. ¹H NMR: 2.76 (s, 3H) 3.59 (s, 3H) 7.43 (m, 1H) 7.99 (m,1H) 8.71 (m, 1H) 8.86 (m, 1H)

c) 3-[4-methyl-5-(methylsulfonyl)-4H-1,2,4-triazol-3-yl]pyridine

KMnO₄ (5 g, 32 mmol) was added to a solution of3-[4-methyl-5-(methylthio)-4H-1,2,4-triazol-3-yl]pyridine (6.0 g, 29mmol) in H₂O (40 mL) and acetic acid (100 mL). After 1 h stirring atr.t. the reaction was basified with 4 M NaOH. CHCl₃ was added and themixture was filtrated through celite. The layers were separated and thewater phase washed with CHCl₃. The combined organic phase was dried andconcentrated to give 3.67 g (53%) of the title compound. ¹H NMR: 3.59(s, 3H) 3.99 (s, 3H) 7.52 (m, 1H) 8.02 (dt, 1H) 8.83 (dd, 1H) 8.91 (m,1H)

EXAMPLE 353-(3,5-difluorophenyl)-4-methyl-5-(methylsulfonyl)-4H-1,2,4-triazole a)5-(3,5-difluorophenyl)-4-methyl-2,4-dihydro-3H-1,2,4-triazole-3-thione

3,5-difluorobenzohydrazide (5 g, 29 mol) and methyl isothiocyanate (2.1g, 29 mmol) were mixed in 2-propanol (100 ml) and heated to 70° C. o.n.The reaction was cooled to r.t. and the formed precipitate was filteredoff. H₂O (100 mL) and NaHCO₃ (4 g, 48 mmol) were added to the solid andthe mixture was heated to 70° C. for 2 h. The reaction mixture wascooled to r.t., acidified with concentrated HCl and the title compound,6.4 g (97%), was collected by filtration. LC-MS (M⁺+1): 228

b) 3-(3,5-difluorophenyl)-4-methyl-5-(methylthio)-4H-1,2,4-triazole

MeI (1.4 mL, 22.4 mmol) was added to a mixture of5-(3,5-difluorophenyl)-4-methyl-2,4-dihydro-3H-1,2,4-triazole-3-thione(5 g, 22 mmol) in acetone (80 mL). NaOH (0.9 g, 22 mmol) in H₂O (20 mL)was added and the reaction was stirred for 3 h at r.t. The formedprecipitate was filtered off and the solution is evaporated to halfvolume and the formed precipitate was filtered off and combined with thefirst filtrate to give 4.92 g (93%) of the title compound.

¹H NMR: 2.75 (s, 3H), 3.79 (s, 3H), 6.80 (m, 1H), 7.58 (m, 2H)

c) 3-(3,5-difluorophenyl)-4-methyl-5-(methylsulfonyl)-4H-1,2,4-triazole

m-CPBA (10 g, 33-50 mmol, 57-86% pure) was added to a solution of3-(3,5-difluorophenyl)-4-methyl-5-(methylthio)-4H-1,2,4-triazole (4.9 g,20.3 mmol) in DCM (60 mL) and the reaction was stirred o.n. 2 M NaOH (50mL) was added and the mixture was extracted. The water phase wasre-extracted with EtOAc (2×) and the combined organic phases were dried(MgSO4) and evaporated to give 5.4 g (98%) of the title compound. ¹HNMR: 3.48 (s, 3H), 4.23 (s, 3H), 6.87 (m, 1H), 7.59 (m, 2H)

EXAMPLE 36 (1R)-1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl acetate

2.22 g (9.93 mmol) racemic1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethanol and 0.40 g Novozyme 435®are taken up under Ar in toluene (120 mL). After addition of 109 μL(1.18 mmol) vinyl acetate the reaction was run at r.t. o.n., followed byaddition of 0.12 g Novozyme 435® and 218 μL (2.36 mmol) vinylacetate andincreasing the temperature to 30° C. o.n. Further addition of 2gNovozyme 435® and 150 μL (1.63 mmol) vinylacetate gave after 7 h ca 41%conversion of starting material. To enhance yield, the reaction wasfiltered over celite washed with DCM, evaporated to dryness, then takenup in toluene (250 mL). After addition of 0.3 g Novozyme 435® and 200 μL(2.17 mmol) vinylacetate under Ar, 48% conversion after 4 h at r.t. wereachieved. Filtration over celite and washing with DCM gave crude whichwas purified over silica using DCM neat, followed by EA/Hep=1/2,yielding 1.26 g (48%) of the title compound. ¹H NMR: 8.15 (m, 1H), 8.03(m, 1H), 7.48 (m, 2H), 6.27 (q, 1H), 2.14 (s, 3H), 1.77 (d, 3H).

EXAMPLE 37 (1R)-1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethanol

1.25 g (4.68 mmol) (1R)-1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethylacetate and 0.48 g (11.4 mmol) lithium hydroxide monohydrate were mixedwith 3:1 THF/Water (28 mL) and stirred for 20 h. After acidificationwith aq. HCl, followed by reducing the volume of the mixture in vacuo,followed by dilution with brine and extraction with DCM. 5.8 g (97%) ofthe title compound was obtained after evaporation & coevaporation withtoluene, followed by drying. ¹H NMR: 8.15 (m, 1H), 8.03 (m, 1H), 7.48(m, 2H), 6.27 (q, 1H), 2.14 (s, 3H), 1.77 (d, 3H).

EXAMPLE 38 (1S)-1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethanol

The title compound was isolated from the reaction as described for thesynthesis of (1R)-1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl acetate.Isolation took place during heptane/ethyl acetate elution of the columnchromatography, yielding 1.09 g (49%) of the title compound. ¹HNMR: 8.16(m, 1H), 8.04 (m, 1H), 7.48 (m, 2H), 5.28 (q, 1H), 1.74 (d, 3H), 1.54(s, 1H)

EXAMPLE 39

General Procedure: Nucleophilic Displacement with2-Chloro-3-Nitro-Pyridine

Piperazine (2-5 mmol) and 2-chloro-3-nitro-pyridine (1 mmol) weredissolved in DMF or acetonitrile (2-3 mL) and stirred for 5 min at roomtemperature. A slight exothermic was observed shortly after addition ofthe solvent. When TLC analysis showed that the reaction was complete,the mixture was diluted with dichloromethane, and washed with water. Theorganic layer was dried, filtered and concentrated, then chromatographedin 10% methanol in dichloromethane to yield the desired product.

In this manner the following compounds were synthesized:

a) (3S)-3-methyl-1-(3-nitropyridin-2-yl)piperazine; yield 92%; ¹H NMR300 MHz, CDCl₃) δ: 1.11 (d, J=6.3 Hz, 3H); 2.74 (dd, J=12.8, 10.4 Hz,1H); 2.99 (m, 4H); 3.72 (m, 2H); 6.74 (dd, J=8.1, 4.5 Hz, 1H); 8.14 (dd,J=8.1, 1.8 Hz, 1H); 8.34 (dd, J=4.5, 1.8 Hz, 1H).

b) (3R)-3-methyl-1-(3-nitropyridin-2-yl)piperazine; yield 100%; ¹H NMR300 MHz,

CDCl₃) δ: 1.11 (d, J=6.3 Hz, 3H); 2.74 (dd, J=12.8, 10.4 Hz, 1H); 2.99(m, 4H); 3.72 (m, 2H); 6.74 (dd, J=8.1, 4.5 Hz, 1H); 8.14 (dd, J=8.1,1.8 Hz, 1H); 8.34 (dd, J=4.5, 1.8 Hz, 1H).

c) 1-(3-nitropyridin-2-yl)piperazine; yield 63%; ¹H NMR 300 MHz, CDCl₃)δ: 3.00 (m, 4H); 3.45 (m, 4H); 6.75 (dd, J=8.1, 4.5 Hz, 1H); 8.14 (dd,J=8.1, 1.8 Hz, 1H); 8.34 (dd, J=4.5, 1.8 Hz, 1H).

EXAMPLE 40

General Procedure: Nucleophilic Displacement with2-Chloro-3-Cyano-Pyrazine

piperazine (1.5 mmol) and 2-chloro-3-nitro-pyridine (1 mmol) weredissolved in acetonitrile (3 mL) and stirred for 30 min at 85° C. Thereaction mixture was diluted with dichloromethane and washed with water.The organic layer was isolated, washed with brine, dried over anhydrousNa₂SO₄ and concentrated in vacuo. The product was purified (SPE columnchromatography, silica gel, 0-10% methanol in ethyl acetate).

In this mailer the following compounds were synthesized:

-   -   a) 3-[(3S)-3-methylpiperazin-1-yl]pyrazine-2-carbonitrile; yield        127.1 mg, 35%, orange oil; ¹H NMR 300 MHz, CDCl₃) δ: 8.26 (m,        1H); 8.00 (m, 1H); 4.40 (m, 2H); 3.05 (m, 4H); 2.77 (m, 1H);        1.74 (m, 1H); 1.16 (d, 3H).    -   b) 3-[(3R)-3-methylpiperazin-1-yl]pyrazine-2-carbonitrile; yield        195.3 mg, 54%, orange oil; ¹H NMR 300 MHz, CDCl₃) δ: 8.26 (m,        1H); 8.00 (m, 1H); 4.40 (m, 2H); 3.05 (m, 4H); 2.77 (m, 1H);        1.74 (m, 1H); 1.16 (d, 3H).

EXAMPLE 41

General Procedure: Palladium Catalyzed Coupling to Heteroaryl Chloride

2-Chloro-nicotinonitrile (1.0 mmol), (S)-2-methyl piperazine (1.5 mmol),sodium tertbutoxide (1.5 mmol) andtris(dibenzylideneacetone)-dipalladium(0) (0.04 mmol) were added to ascrew cap vial.2,8,9-Triisobutyl-2,5,8,9-tetraaza-1-phospha-bicyclo[3.3.3] undecane(0.08 mmol) was dissolved in toluene (5 mL) and this solution was addedto the other reagents. The reaction mixture was stirred at 100° C.overnight. The solution was diluted with dichloromethane and washed withwater. The organic phase was dried, filtered and concentrated, thenpurified by flash chromatography in 10% (2M ammonia in methanol) indichloromethane to yield the desired product.

In this manner the following compounds were synthesized:

-   -   a) 2-[(3S)-3-methylpiperazin-1-yl]nicotinonitrile; yield 64%; ¹H        NMR 300 MHz, CDCl₃) δ: 1.03 (d, J=6.3 Hz, 3H); 1.73 (s, broad,        1H); 2.59 (dd, J=12.9, 10.2 Hz, 1H); 2.94 (m, 4H); 4.16 (m, 2H);        6.64 (dd, J=7.8, 4.8 Hz, 1H); 7.66 (dd, J=7.8, 2.1 Hz, 1H); 8.23        (dd, J=4.8, 2.1 Hz, 1H).    -   b) 2-[(3R)-3-methylpiperazin-1-yl]nicotinonitrile; yield 46%; ¹H        NMR 300 MHz, CDCl₃) δ:1.03 (d, J=6.3 Hz, 3H); 1.73 (s, broad,        1H); 2.59 (dd, J=12.9, 10.2 Hz, 1H); 2.94 (m, 4H); 4.16 (m, 2H);        6.64 (dd, J=7.8, 4.8 Hz, 1H); 7.66 (dd, J=7.8, 2.1 Hz, 1H); 8.23        (dd, J=4.8, 2.1 Hz, 1H).

EXAMPLE 424-(5-{2-[5-(3-chlorophenyl)-2H-tetrazol-2-yl]propyl}-4-methyl-4H-1,2,4-triazol-3-yl)pyridine

Oxalylchloride (2M in DCM, 0.28 mL, 0.55 mmol) was dropwise added during5 minutes to a solution of3-[5-(3-chlorophenyl)-2H-tetrazol-2-yl]-N-methylbutanamide (140 mg, 0.5mmol) and 2,6-lutidine (0.12 mL, 1 mmol) in DCM (5 mL) at 0° C. Themixture was stirred at 0° C. for 1 h and isonicotinic acid hydrazide(103 mg, 0.75 mmol) was added. DCM was evaporated after 4 h stirring atr.t. Sat. aq. NaHCO₃ (10 mL) was added to the residue and the mixturewas refluxed for 16 h. The reaction was allowed to attain r.t., followedby extracted with CHCl₃ (3×20 mL). The combined organic phases weredried (MgSO₄), concentrated and purified by prep HPLC to yield the titlecompound (3 mg, 2%). ¹HNMR: 1.91 (d, 3H), 3.51 (m, 1H), 3.65 (m, 4H),5.74 (q, 1H), 7.43 (m, 2H), 7.62 (d, 2H), 8.01 (dt, 1H), 8.11 (m, 1H),8.78 (br. s., 2H) MS (ESI) m/z 381 (M+1).

EXAMPLE 434-(5-{(R)-1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine

(1R)-1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethanol (0.31 g, 1.38 mmol),4-(5-Methanesulfonyl-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine (0.32 g,1.34 mmol), cesium carbonate (0.58 g, 1.78 mmol) and DMF (4 mL) aremixed and stirred at 60° C. o.n. under Argon. Partitioning between waterand DCM and reextraction of aq. layer with DCM, combining the organiclayers, gave after evaporation in vacuo, followed by flashchromatography (heptane/ethyl acetate/methanol=10/10/1 to 5/5/1) &drying the title compound (490 mg, 96%). ¹H-NMR: 8.66 (m, 2H), 8.07 (t,1H), 7.96 (m, 1H), 7.55 (m, 2H), 7.40 (m, 2H), 6.51 (q, 1H), 3.57 (s,3H), 1.95 (d, 3H).

In a similar manner, the following compounds were prepared:

b)4-(5-{(S)-1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine;yield 1.55 g, 91%; ¹H NMR CDCl₃ δ: 8.66 (m, 2H), 8.07 (t, 1H), 7.96 (m,1H), 7.55 (m, 2H), 7.40 (m, 2H), 6.51 (q, 1H), 3.57 (s, 3H), 1.95 (d,3H)

c)2-(3-Chloro-phenyl)-5-{(R)-1-[5-(3,5-difluoro-phenyl)-4-methyl-4H-[1,2,4]triazol-3-yloxy]-ethyl}-2H-tetrazole;yield 77 mg, 77%; ¹HNMR CDCl₃ δ: 8.16 (m, 1H), 8.04 (dt, 1H), 7.48 (m,2H), 7.21 (m, 2H), 6.92 (m, 1H), 6.57 (q, 1H), 3.56 (s, 3H), 2.01 (d,3H)

d)3-(5-{(R)-1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine;yield 72 mg, 55%; ¹HNMR CDCl₃ δ: 8.88 (m, 1H), 8.71 (dd, 1H), 8.16 (m,1H), 8.03 (m, 2H), 7.48 (m, 2H), 7.43 (m, 1H), 6.58 (q, 1H), 3.57 (s,3H), 2.02 (d, 3H)

EXAMPLE 44 1-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl-ethanol

Ozone was bubbled through a solution of2-(3-chlorophenyl)-5-[1-methyl-2-phenylvinyl]-2H-tetrazole (2.73 g, 9.2mmol) in methanol (75 mL) and dichloromethane (75 mL) at −78° C. Whenthe color lightened and the starting material had disappeared by TLC,oxygen was bubbled through the mixture for approximately 2-3 minutes.Sodium borohydride (635 mg, 16.8 mmol) was added. The reaction wasallowed to warm to room temperature, stirred for 30 minutes and quenchedwith water (5 mL) and saturated ammonium chloride (5 mL). After removalof the solvent in vacuo, the product was partitioned betweendichloromethane and water, dried over sodium sulfate, and the solventwas removed in vacuo. Flash chromatography (15-35% ethyl acetate inhexane) yielded the title compound as a yellow solid (1.795 g, 87%).¹HNMR (CDCl₃) δ (ppm): 8.19 (m, 1H), 8.06 (m, 1H), 7.50 (m, 2H), 5.3 (m,1H), 2.54 (m, 1H), 1.78 (d, 3H).

Pharmacology

The pharmacological properties of the compounds of the invention can beanalyzed using standard assays for functional activity. Examples ofglutamate receptor assays are well known in the art as described in forexample Aramori et al., Neuron 8:757 (1992), Tanabe et al., Neuron 8:169(1992), Miller et al., J. Neuroscience 15: 6103 (1995), Balazs, et al.,J. Neurochemistry 69:151 (1997). The methodology described in thesepublications is incorporated herein by reference. Conveniently, thecompounds of the invention can be studied by means of an assay thatmeasures the mobilization of intracellular calcium, [Ca²⁺]_(i) in cellsexpressing mGluR5.

For FLIPR analysis, cells expressing human mGluR5das described inWO97/05252 were seeded on collagen coated clear bottom 96-well plateswith black sides and analysis of [Ca²⁺]_(i) mobilization was done 24 hafter seeding.

FLIPR experiments were done using a laser setting of 0.800 W and a 0.4second CCD camera shutter speed. Each FLIPR experiment was initiatedwith 160 μl of buffer present in each well of the cell plate. After eachaddition of the compound, the fluorescence signal was sampled 50 timesat 1 second intervals followed by 3 samples at 5 second intervals.Responses were measured as the peak height of the response within thesample period. EC₅₀ and IC₅₀ determinations were made from data obtainedfrom 8-point concentration response curves (CRC) performed in duplicate.Agonist CRC were generated by scaling all responses to the maximalresponse observed for the plate. Antagonist block of the agonistchallenge was normalized to the average response of the agonistchallenge in 14 control wells on the same plate.

We have validated a secondary functional assay for mGluR5das describedin WO97/05252 based on Inositol Phosphate (IP₃) turnover. IP₃accumulation is measured as an index of receptor mediated phospholipaseC turnover. GHEK cells stably expressing the human mGluR5dreceptors wereincubated with [3H] myo-inositol overnight, washed three times in HEPESbuffered saline and pre-incubated for 10 min with 10 mM LiCl. Compounds(agonists) were added and incubated for 30 min at 37° C. Antagonistactivity was determined by pre-incubating test compounds for 15 min,then incubating in the presence of glutamate (80 μM) or DHPG (30 μM) for30 min. Reactions were terminated by the addition of perchloric acid(5%). Samples were collected and neutralized, and inositol phosphateswere separated using Gravity-Fed Ion-Exchange Columns.

A detailed protocol for testing the compounds of the invention isprovided in the assay below.

Assay of Group I Receptor Antagonist Activity

For FLIPR analysis, cells expressing human mGluR5d as described inWO97/05252 were seeded on collagen coated clear bottom 96-well plateswith black sides and analysis of [Ca^(2+]) _(i) mobilization wasperformed 24 h following seeding. Cell cultures in the 96-well plateswere loaded with a 4 μM solution of acetoxymethyl ester form of thefluorescent calcium indicator fluo-3 (Molecular Probes, Eugene, Oreg.)in 0.01% pluronic. All assays were performed in a buffer containing 127mM NaCl, 5 mM KCl, 2 mM MgCl₂, 0.7 mM NaH₂PO₄, 2 mM CaCl₂, 0.422 mg/mlNaHCO₃, 2.4 mg/ml HEPES, 1.8 mg/ml glucose and 1 mg/ml BSA Fraction IV(pH 7.4).

FLIPR experiments were done using a laser setting of 0.800 W and a 0.4second CCD camera shutter speed with excitation and emission wavelengthsof 488 nm and 562 nm, respectively. Each FLIPR experiment was initiatedwith 160 μl of buffer present in each well of the cell plate. A 40 μladdition from the antagonist plate was followed by a 50 μL addition fromthe agonist plate. After each addition the fluorescence signal wassampled 50 times at 1 second intervals followed by 3 samples at 5 secondintervals. Responses were measured as the peak height of the responsewithin the sample period. EC₅₀/IC₅₀ determinations were made from dataobtained from 8 points concentration response curves (CRC) performed induplicate. Agonist CRC were generated by scaling all responses to themaximal response observed for the plate. Antagonist block of the agonistchallenge was normalized to the average response of the agonistchallenge in 14 control wells on the same plate.

Measurement of Inositol Phosphate Turnover in Intact Whole Cells

GHEK stably expressing the human mGluR5dreceptor were seeded onto 24well poly-L-lysine coated plates at 40×10⁴ cells/well in mediacontaining 1 μCi/well [3H] myo-inositol. Cells were incubated overnight(16 h), then washed three times and incubated for 1 h at 37° C. in HEPESbuffered saline (146 mM NaCl, 4.2 mM KCl, 0.5 mM MgCl₂, 0.1% glucose, 20mM HEPES, pH 7.4) supplemented with 1 unit/ml glutamate pyruvatetransaminase and 2 mM pyruvate. Cells were washed once in HEPES bufferedsaline and pre-incubated for 10 min in HEPES buffered saline containing10 mM LiCl. Compounds (agonists) were added and incubated at 37° C. for30 min. Antagonist activity was determined by pre-incubating testcompounds for 15 min, then incubating in the presence of glutamate (80μM) or DHPG (30 μM) for 30 min. The reaction was terminated by theaddition of 0.5 ml perchloric acid (5%) on ice, with incubation at 4° C.for at least 30 min. Samples were collected in 15 ml Falcon tubes andinositol phosphates were separated using Dowex columns, as describedbelow.

Assay For Inositol Phosphates Using Gravity-Fed Ion-Exchange Columns

Preparation of Ion-Exchange Columns

Ion-exchange resin (Dowex AG1-X8 formate form, 200-400 mesh, BIORAD)washed three times with distilled water and stored at 4° C. 1.6 ml resinwas added to each column, and washed with 3 ml 2.5 mM HEPES, 0.5 mMEDTA, pH 7.4.

a) Sample Treatment

Samples were collected in 15 ml Falcon tubes and neutralized with 0.375M HEPES, 0.75 M KOH. 4 ml of HEPES/EDTA (2.5/0.5 mM, pH 7.4) were addedto precipitate the potassium perchlorate. Supernatant was added to theprepared Dowex columns.

b) Inositol Phosphate Separation

Elute glycero phosphatidyl inositols with 8 ml 30 mM ammonium formate.Elute total inositol phosphates with 8 ml 700 mM ammonium formate/100 mMformic acid and collect eluate in scintillation vials. Count eluatemixed with 8 ml scintillant.

One aspect of the invention relates to a method for inhibitingactivation of mGluR 5, comprising treating a cell containing saidreceptor with an effective amount of the compound of formula I.

Screening for Compounds Active Against tlesr

Adult Labrador retrievers of both genders, trained to stand in a Pavlovsling, are used. Mucosa-to-skin esophagostomies are formed and the dogsare allowed to recover completely before any experiments are done.

Motility Measurement

In brief, after fasting for approximately 17 h with free supply ofwater, a multilumen sleeve/sidehole assembly (Dentsleeve, Adelaide,South Australia) is introduced through the esophagostomy to measuregastric, lower esophageal sphincter (LES) and esophageal pressures. Theassembly is perfused with water using a low-compliance manometricperfusion pump (Dentsleeve, Adelaide, South Australia). An air-perfusedtube is passed in the oral direction to measure swallows, and anantimony electrode monitored pH, 3 cm above the LES. All signals areamplified and acquired on a personal computer at 10 Hz.

When a baseline measurement free from fasting gastric/LES phase IIImotor activity has been obtained, placebo (0.9% NaCl) or test compoundis administered intravenously (i.v., 0.5 ml/kg) in a foreleg vein. Tenmin after i.v. administration, a nutrient meal (10% peptone, 5%D-glucose, 5% Intralipid, pH 3.0) is infused into the stomach throughthe central lumen of the assembly at 100 ml/min to a final volume of 30ml/kg. The infusion of the nutrient meal is followed by air infusion ata rate of 500 ml/min until an intragastric pressure of 10±1 mmHg isobtained. The pressure is then maintained at this level throughout theexperiment using the infusion pump for further air infusion or forventing air from the stomach. The experimental time from start ofnutrient infusion to end of air insufflation is 45 min. The procedurehas been validated as a reliable means of triggering TLESRs.

TLESRs is defined as a decrease in lower esophageal sphincter pressure(with reference to intragastric pressure) at a rate of >1 mmHg/s. Therelaxation should not be preceded by a pharyngeal signal <2s before itsonset in which case the relaxation is classified as swallow-induced. Thepressure difference between the LES and the stomach should be less than2 mmHg, and the duration of the complete relaxation longer than 1 s.

Results

Typical IC₅₀ values as measured in the assays described above are 10 μMor less. In one aspect of the invention the IC₅₀ is below 2 μM. Inanother aspect of the invention the IC₅₀ is below 0.2 μM. In a furtheraspect of the invention the IC₅₀ is below 0.05 μM.

Examples of IC₅₀ values for individual compounds is given below:Compound FLIPR IC₅₀ 4-[5-({1-[2-(5-chloro-2-fluorophenyl)-2H-  55 nMtetrazol-5-yl]ethyl}thio)-4-methyl-4H- 1,2,4-triazol-3-yl]pyridine Ethyl4-{1-[2-(3-chlorophenyl)-2H-tetrazol- 132 nM5-yl]ethyl}piperazine-1-carboxylate

1. A compound according to formula I

wherein X₃ and X₄ are selected from N and C, such that when X₃ is N, X₄is C and when X₃ is C, X₄ is N; P is selected from aryl and heteroaryl;if m=1 then R¹ is attached to P via a carbon atom on ring P at themeta-position of the ring P relative to the attachment point of P at X³,and if m=2 then R¹ is attached to P via carbon atoms on ring P at the2-, and 5-positions of the ring P; R¹ is selected from the groupconsisting of hydroxy, halo, nitro, C₁₋₆alkylhalo, OC₁₋₆alkylhalo,C₁₋₆alkyl, OC₁₋₆alkyl, C₂₋₆alkenyl, OC₂₋₆alkenyl, C₂₋₆alkynyl,OC₂₋₆alkynyl, C₀₋₆alkylC₃₋₆cycloalkyl, OC₀₋₆alkylC₃₋₆cycloalkyl,C₀₋₆alkylaryl, OC₀₋₆alkylaryl, CHO, (CO)R⁵, O(CO)R⁵, O(CO)OR⁵,O(CNR⁵)OR⁵, C₁₋₆alkylOR⁵, OC₂₋₆alkylOR⁵, C₁₋₆alkyl(CO)R⁵,OC₁₋₆alkyl(CO)R⁵, C₀₋₆alkylCO₂R⁵, OC₁₋₆alkylCO₂R⁵, C₀₋₆alkylcyano,OC₂₋₆alkylcyano, C₀₋₆alkylNR⁵R⁶, OC₂₋₆alkylNR⁵R⁶, C₁₋₆alkyl(CO)NR⁵R⁶,OC₁₋₆alkyl(CO)NR⁵R⁶, C₀₋₆alkylNR⁵(CO)R⁶, OC₂₋₆alkylNR⁵(CO)R⁶,C₀₋₆alkylNR⁵(CO)NR⁵R⁶, C₀₋₆alkylSR⁵, OC₂₋₆alkylSR⁵, C₀₋₆alkyl(SO)R⁵,OC₂₋₆alkyl(SO)R⁵, C₀₋₆alkylSO₂R⁵, OC₂₋₆alkylSO₂R⁵, C₀₋₆alkyl(SO₂)NR⁵R⁶,OC₂₋₆alkyl(SO₂)NR⁵R⁶,C₀₋₆alkylNR⁵(SO₂)R⁶, OC₂₋₆alkylNR⁵(SO₂)R⁶,C₀₋₆alkylNR⁵(SO₂)NR⁵R⁶, OC₂₋₆alkylNR⁵(SO₂)NR⁵R⁶, (CO)NR⁵R⁶, O(CO)NR⁵R⁶,NR⁵OR⁶, C₀₋₆alkylNR⁵(CO)OR⁶, OC₂₋₆alkylNR⁵(CO)OR⁶, SO₃R⁵ and a 5- or6-membered ring containing one or more atoms independently selected fromthe group consisting of C, N, O and S; X¹ is selected from the groupconsisting of C₂₋₃alkyl, C₂₋₃alkenyl, NR³, O, S, CR³R⁴, SO, SO₂ X² isselected from the group consisting of a bond, CR³R⁴, O, S, NR³, SO, SO₂R³ and R⁴ are independently selected from a group consisting ofhydrogen, hydroxy, C₁₋₆alkyl, C₀₋₆alkylcyano, oxo, ═NR⁵, ═NOR⁵,C₁₋₄alkylhalo, halo, C₁₋₄alkylC₃₋₇cycloalkyl, C₃₋₇cycloalkyl,O(CO)C₁₋₄alkyl, (CO)C₁₋₄alkyl, C₁₋₄alkyl(SO)C₀₋₄alkyl,C₁₋₄alkyl(SO₂)C₀₋₄alkyl, (SO)C₀₋₄alkyl, (SO₂)C₀₋₄alkyl, OC₁₋₄alkyl,C₁₋₄alkylOR⁵ and C₀₋₄alkylNR⁵R⁶; Q is either selected from triazole,piperazine, and imidazole, or else Q is any other 4-, 5-, 6-, or7-membered heterocyclic ring containing one or more heteroatoms selectedfrom N, O and S and is fused to a triazole ring; R² is selected from thegroup consisting of hydroxy, C₀₋₆alkylcyano, ═NR⁵, ═O, ═NOR⁵,C₁₋₄alkylhalo, halo, C₁₋₆alkyl, C₃₋₆cycloalkyl, C₀₋₆alkylaryl,C₀₋₆alkylheteroaryl, C₀₋₆alkylcycloalkyl, C₀₋₆alkylheterocycloalkyl,OC₁₋₄alkyl, OC₀₋₆alkylaryl, O(CO)C₁₋₄alkyl, (CO)OC₁₋₄alkyl,C₀₋₄alkyl(S)C₀₋₄alkyl, C₁₋₄alkyl(SO)C₀₋₄alkyl, C₁₋₄alkyl(SO₂)C₀₋₄alkyl,(SO)C₀₋₄alkyl, (SO₂)C₀₋₄alkyl, C₁₋₄alkylOR⁵, C₀₋₄alkylNR⁵R⁶ and a 5- or6-membered ring containing one or more atoms independently selected fromC, N, O and S, which ring may optionally be fused with a 5- or6-membered ring containing one or more atoms independently selected fromthe group consisting of C, N and O and wherein said ring and said fusedring may be substituted by one or more A; and any C₁₋₆alkyl, aryl, orheteroaryl defined under R¹, R² and R³ may be substituted by one or moreA; and A is selected from the group consisting of hydrogen, hydroxy,halo, nitro, oxo, C₀₋₆alkylcyano, C₀₋₄alkylC₃₋₆cycloalkyl, C₁₋₆alkyl,—OC₁₋₆alkyl, C₁₋₆alkylhalo, OC₁₋₆alkylhalo, C₂₋₆alkenyl, C₀₋₃ alkylaryl,C₀₋₆alkylOR⁵, OC₂₋₆alkylOR⁵, C₁₋₆alkylSR⁵, OC₂₋₆alkylSR⁵, (CO)R⁵,O(CO)R⁵, OC₂₋₆alkylcyano, OC₁₋₆alkylCO₂R⁵, O(CO)OR⁵, OC₁₋₆alkyl(CO)R⁵,C₁₋₆alkyl(CO)R⁵, NR⁵OR⁶, C₀₋₆NR⁵R⁶, OC₂₋₆alkylNR⁵R⁶, C₀₋₆alkyl(CO)NR⁵R⁶,OC₁₋₆alkyl(CO)NR⁵R⁶, OC₂₋₆alkylNR⁵(CO)R⁶, C₀₋₆alkylNR⁵(CO)R⁶,C₀₋₆alkylNR⁵(CO)NR⁵R⁶, O(CO)NR⁵R⁶, C₀₋₆alkyl(SO₂)NR⁵R⁶,OC₂₋₆alkyl(SO₂)NR⁵R⁶, C₀₋₆alkylNR⁵(SO₂)R⁶, OC₂₋₆alkylNR⁵(SO₂)R⁶, SO₃R⁵,C₁₋₆alkylNR⁵(SO₂)NR⁵R⁶, OC₂₋₆alkyl(SO₂)R⁵, C₀₋₆alkyl(SO₂)R⁵,C₀₋₆alkyl(SO)R⁵, OC₂₋₆alkyl(SO)R⁵ and a 5- or 6-membered ring containingone or more atoms independently selected from the group consisting of C,N, O and S; R⁵ and R⁶ are independently selected from, H, C₁₋₆alkyl,C₃₋₇cycloalkyl and aryl and salts and hydrates thereof m is selectedfrom 1 or 2 p is selected from 0, 1, 2, 3 or 4 or a salt or hydratethereof; provided that the compound is not1-(2-benzothiazolyl)-4-[[5-(5-methyl-2-furanyl)-2H-tetrazol-2-yl]acetyl-piperazine,1-(4-acetylphenyl)-4-[[5-(5-methyl-2-furanyl)-2H-tetrazol-2-yl]acetyl]-piperazine,or5-(5-methyl-2-furanyl)-N-(2-phenyl-2H-benzotriazol-5-yl)-2H-tetrazole-2-acetamide.2. A compound according to claim 1 wherein X₃ is N and X₄ is C.
 3. Acompound according to claim 1 wherein P is aryl.
 4. A compound accordingto claim 3 wherein P is phenyl.
 5. A compound according to claim 1wherein R¹ is selected from halo, C₁₋₆alkyl, —OC₁₋₆alkyl,C₀₋₆alkylcyano.
 6. A compound according to claim 5 wherein, R¹ isselected from Cl, F, cyano and methyl.
 7. A compound according to claim1 wherein X¹ is CR³R⁴.
 8. A compound according to claim 7 wherein X² isselected from CR³R⁴, O, S and NR³.
 9. A compound according to claim 1wherein Q is either selected from triazole and piperazine, or else Q isany other 4-, 5-, 6-, or 7-membered heterocyclic ring containing one ormore heteroatoms selected from N, O and S and is fused to a triazolering.
 10. A compound according to claim 1 wherein Q is triazole.
 11. Acompound according to claim 1 wherein X² is a bond.
 12. A compoundaccording to claim 1 wherein Q is piperazine.
 13. A compound accordingto claim 1 wherein Q is a 5-, 6-, or 7-membered heterocyclic ring, otherthan triazole or piperazine, and is fused to a triazole ring.
 14. Acompound according to claim 1 wherein R² is selected from the groupconsisting of C₁₋₆alkyl, C₁₋₆alkylhalo, C₃₋₇ cylcoalkyl, C₀₋₆alkylaryl,C₀₋₆alkylheteroaryl, O(CO)C₁₋₄alkyl.
 15. A compound according to claim 1wherein R² is a 5- or 6-membered ring containing one or more atomsindependently selected from C, N, O and S, which ring may optionally befused with a 5- or 6-membered ring containing one or more atomsindependently selected from the group consisting of C, N and O andwherein said ring and said fused ring may be substituted by one or moreA.
 16. A compound according to claim 1 wherein A is selected from thegroup consisting of halo, —OC₁₋₆alkyl, C₀₋₆NR⁵R⁶, C₁₋₆alkylhalo.
 17. Acompound according to claim 1 selected from: Ethyl4-{[2-(3-chlorophenyl)-2H-tetrazol-5-yl]methyl}piperazine-1-carboxylate,4-[2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-ylmethyl]-piperazine-1-carboxylicacid ethyl ester,4-(2-m-Tolyl-2H-tetrazol-5-ylmethyl)-piperazine-1-carboxylic acid ethylester,4-[2-(3-Iodo-phenyl)-2H-tetrazol-5-ylmethyl]-piperazine-1-carboxylicacid ethyl ester,4-[2-(3-Cyano-phenyl)-2H-tetrazol-5-ylmethyl]-piperazine-1-carboxylicacid ethyl ester,4-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-ylmethyl]-piperazine-1-carboxylicacid ethyl ester,4-[5-({[2-(3-chlorophenyl)-2H-tetrazol-5-yl]methyl}thio)-4-cyclopropyl-4H-1,2,4-triazol-3-yl]pyridine,4-[5-({1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}thio)-4-cyclopropyl-4H-1,2,4-triazol-3-yl]pyridine,Ethyl4-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazine-1-carboxylate,4-{5-[2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-ylmethylsulfanyl]-4-methyl-4H-[1,2,4]triazol-3-yl}-pyridine,4-{5-[2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-ylmethylsulfanyl]-4-cyclopropyl-4H-[1,2,4]triazol-3-yl}-pyridine,4-(5-{1-[2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-yl]-ethylsulfanyl}-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine,4-(5-{1-[2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-yl]-ethylsulfanyl}-4-cyclopropyl-4H-[1,2,4]triazol-3-yl)-pyridine,4-{1-[2-(5-Chloro-2-fluoro-phenyl)-2H-tetrazol-5-yl]-ethyl}-piperazine-1-carboxylicacid ethyl ester,4-[4-Cyclopropyl-5-(2-m-tolyl-2H-tetrazol-5-ylmethylsulfanyl)-4H-[1,2,4]triazol-3-yl]-pyridine,4-{4-Cyclopropyl-5-[1-(2-m-tolyl-2H-tetrazol-5-yl)-ethylsulfanyl]-4H-[1,2,4]triazol-3-yl}-pyridine,4-{4-Methyl-5-[1-(2-m-tolyl-2H-tetrazol-5-yl)-ethylsulfanyl]-4H-[1,2,4]triazol-3-yl}-pyridine,3-[5-(4-Cyclopropyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-ylsulfanylmethyl)-tetrazol-2-yl]-benzonitrile,3-{5-[1-(4-Cyclopropyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-ylsulfanyl)-ethyl]-tetrazol-2-yl}-benzonitrile3-{5-[1-(4-Methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-ylsulfanyl)-ethyl]-tetrazol-2-yl}-benzonitrile-4-{4-Cyclopropyl-5-[2-(2-fluoro-5-methyl-phenyl)-2H-tetrazol-5-ylmethylsulfanyl]-4H-[1,2,4]triazol-3-yl}-pyridine,4-(4-Cyclopropyl-5-{1-[2-(2-fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethylsulfanyl}-4H-[1,2,4]triazol-3-yl)-pyridine,4-(5-{1-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethylsulfanyl}-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine,Methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-(2-m-tolyl-2H-tetrazol-5-ylmethyl)amine,Methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-[1-(2-m-tolyl-2H-tetrazol-5-yl)ethyl]-amine,[2-(3-Chloro-phenyl)-2H-tetrazol-5-ylmethyl]-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine,{1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethyl}-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine,[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-ylmethyl]-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine,{1-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethyl}-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine,[2-(3-Iodo-phenyl)-2H-tetrazol-5-ylmethyl]-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine,{1-[2-(3-Iodo-phenyl)-2H-tetrazol-5-yl]-ethyl}-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine,Methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-(2-m-tolyl-2H-tetrazol-5-ylmethyl)amine,Methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-[1-(2-m-tolyl-2H-tetrazol-5-yl)ethyl]-amine,[2-(3-Chloro-phenyl)-2H-tetrazol-5-ylmethyl]-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine,{1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethyl}-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine,[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-ylmethyl]-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine,{1-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethyl}-methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amine,8-[2-(3-Iodo-phenyl)-2H-tetrazol-5-ylmethyl]-3-pyridin-4-yl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine,8-{1-[2-(3-Iodo-phenyl)-2H-tetrazol-5-yl]-ethyl}-3-pyridin-4-yl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidine,3-Pyridin-4-yl-8-(2-m-tolyl-2H-tetrazol-5-ylmethyl)-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene,3-Pyridin-4-yl-8-[1-(2-m-tolyl-2H-tetrazol-5-yl)-ethyl]-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene,8-[2-(3-Chloro-phenyl)-2H-tetrazol-5-ylmethyl]-3-pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene,8-{1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethyl}-3-pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene,8-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-ylmethyl]-3-pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene,8-{1-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethyl}-3-pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene,8-[2-(3-Iodo-phenyl)-2H-tetrazol-5-ylmethyl]-3-pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene,8-{1-[2-(3-Iodo-phenyl)-2H-tetrazol-5-yl]-ethyl}-3-pyridin-4-yl-5,6,7,8-tetrahydro-4H-1,2,3a,8-tetraaza-azulene,4-(5-{[2-(3-chlorophenyl)-2H-tetrazol-5-yl]methoxy}-4-methyl-4H-1,2,4-triazol-3-yl)pyridine,4-(5-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethoxy}-4-methyl-4H-1,2,4-triazol-3-yl)pyridine,4-[4-Methyl-5-(2-m-tolyl-2H-tetrazol-5-ylmethoxy)-4H-[1,2,4]triazol-3-yl]-pyridine,4-{4-Methyl-5-[1-(2-m-tolyl-2H-tetrazol-5-yl)-ethoxy]-4H-[1,2,4]triazol-3-yl}-pyridine,4-{5-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-ylmethoxy]-4-methyl-4H-[1,2,4]triazol-3-yl}-pyridine,4-(5-{1-[2-(2-Fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine,4-{5-[2-(3-Chloro-phenyl)-2H-tetrazol-5-ylmethoxy]-4-cyclopropyl-4H-[1,2,4]triazol-3-yl}-pyridine,4-(5-{1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4-cyclopropyl-4H-[1,2,4]triazol-3-yl)-pyridine,4-[4-Cyclopropyl-5-(2-m-tolyl-2H-tetrazol-5-ylmethoxy)-4H-[1,2,4]triazol-3-yl]-pyridine,4-{4-Cyclopropyl-5-[1-(2-m-tolyl-2H-tetrazol-5-yl)-ethoxy]-4H-[1,2,4]triazol-3-yl}-pyridine,4-{4-Cyclopropyl-5-[2-(2-fluoro-5-methyl-phenyl)-2H-tetrazol-5-ylmethoxy]-4H-[1,2,4]triazol-3-yl}-pyridine,4-(4-Cyclopropyl-5-{1-[2-(2-fluoro-5-methyl-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4H-[1,2,4]triazol-3-yl)-pyridine,4-{5-[2-(3-Iodo-phenyl)-2H-tetrazol-5-ylmethoxy]-4-methyl-4H-[1,2,4]triazol-3-yl}-pyridine,4-(5-{1-[2-(3-Iodo-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4-methyl-4H-[1,2,4]triazol-3-yl)pyridine,4-{4-Cyclopropyl-5-[2-(3-iodo-phenyl)-2H-tetrazol-5-ylmethoxy]-4H-[1,2,4]triazol-3-yl}-pyridine,4-(4-Cyclopropyl-5-{1-[2-(3-iodo-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4H-[1,2,4]triazol-3-yl)pyridine,3-[5-(4-Methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yloxymethyl)-tetrazol-2-yl]-benzonitrile3-{5-[1-(4-Methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yloxy)-ethyl]-tetrazol-2-yl}-benzonitrile,3-[5-(4-Cyclopropyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yloxymethyl)-tetrazol-2-yl]-benzonitrile,3-{5-[1-(4-Cyclopropyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yloxy)-ethyl]-tetrazol-2-yl}-benzonitrile,3-(5-{[Methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amino]-methyl}-tetrazol-2-yl)-benzonitrile,3-(5-{1-[Methyl-(4-methyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-amino]-ethyl}-tetrazol-2-yl)-benzonitrile,3-[5-(3-Pyridin-4-yl-6,7-dihydro-5H-[1,2,4]triazolo[4,3-a]pyrimidin-8-ylmethyl)-tetrazol-2-yl]-benzonitrile,3-{5-[1(3-Pyridin-4-yl-6,7-dihydro-5H-[1,2,4]triazolo[4,3-a]pyrimidin-8-yl)-ethyl]-tetrazol-2-yl}-benzonitrile,3-[5-(3-Pyridin-4-yl-4,5,6,7-tetrahydro-1,2,3a,8-tetraaza-azulen-8-ylmethyl)-tetrazol-2-yl]-benzonitrile,3-{5-[1-(3-Pyridin-4-yl-4,5,6,7-tetrahydro-1,2,3a,8-tetraaza-azulen-8-yl)-ethyl]-tetrazol-2-yl}-benzonitrile,(R) &(S)-4-(5-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethoxy}-4-methyl-4H-1,2,4-triazol-3-yl)pyridine,2-(3-chloro-phenyl)-5-[(triphenyl-□⁵-phosphanyl)-methyl]-2H-tetrazolehydrobromide,4-(5-{2-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl]-vinyl}-4-ethyl-4H-[1,2,4]triazol-3-yl)pyridine,4-(5-{2-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl]-vinyl}-4-ethyl-4H-[1,2,4]triazol-3-yl)pyridine,1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-2-(4-cyclopropyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-ethanol,2-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-1-(4-cyclopropyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-yl)-ethanol,4-(5-{2-[2-(3-chloro-phenyl)-2H-tetrazol-5-yl]-vinyl}-4-ethyl-4H-[1,2,4]triazol-3-yl)pyridine,3-[4-Methyl-5-({[2-(3-methylphenyl)-2H-tetrazol-5-yl]methyl}thio)-4H-1,2,4-triazol-3-yl]benzonitrile,5-({[5-(3,5-Difluorophenyl)-4-ethyl-4H-1,2,4-triazol-3-yl]thio}methyl)-2-(3-methylphenyl)-2H-tetrazole,3-[4-Methyl-5-({1-[2-(3-methylphenyl)-2H-tetrazol-5-yl]ethyl)thio)-4H-1,2,4-triazol-3-yl]benzonitrile,5-(1-{[5-(3,5-Difluorophenyl)-4-ethyl-4H-1,2,4-triazol-3-yl]thio}ethyl)-2-(3-methylphenyl)-2H-tetrazole,6-(4-{1-[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazin-1-yl)nicotinonitrile,3-(4-{1-[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazin-1-yl)pyrazine-2-carbonitrile,2-(4-{1-[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazin-1-yl)nicotinonitrile,1-{1-[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]ethyl}-4-(3-nitropyridin-2-yl)piperazine,8-{1-[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]ethyl}-3-(3,5-difluorophenyl)-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrimidine,8-{1-[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]ethyl}-3-(4-methoxyphenyl)-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrimidine,3-(2-Chloro-6-methoxypyridin-4-yl)-8-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}-5,6,7,8-Tetrahydro[1,2,4]triazolo[4,3-a]pyrimidine,8-{1-[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]ethyl}-3-(2-methoxypyridin-4-yl)-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrimidine,8-{[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]methyl}-3-(2-methoxypyridin-4-yl)-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrimidine,3-(5-{[3-(2-Methoxypyridin-4-yl)-6,7-dihydro[1,2,4]triazolo[4,3-a]pyrimidine-8(5H)-yl]methyl}-2H-tetrazol-2-yl)benzonitrile,3-(2-Methoxypyridin-4-yl)-8-{1-[2-(3-iodophenyl)-2H-tetrazol-5-yl]ethyl}-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrimidine,3-(5-{1-[3-(2-Methoxypyridin-4-yl)-6,7-dihydro[1,2,4]triazolo[4,3-a]pyrimidin-8(5H)-yl]ethyl}-2H-tetrazol-2-yl)benzonitrile,3-(5-{[3-(2-Methoxypyridin-4-yl)-5,6,7,8-tetrahydro-9H-[1,2,4]triazolo[4,3-a][1,3]diazepin-9-yl]methyl}-2H-tetrazol-2-yl)benzonitrile,3-(5-{[3-(2,6-Dimethoxypyrimidin-4-yl)-6,7-dihydro[1,2,4]triazolo[4,3-a]pyrimidin-8(5H)-yl]methyl}-2H-tetrazol-2-yl)benzonitrile,(R)3-(5-{1-[3-(2-Methoxypyridin-4-yl)-6,7-dihydro[1,2,4]triazolo[4,3-a]pyrimidin-8(5H)-yl]ethyl}-2H-tetrazol-2-yl)benzonitrile,(S)3-(5-{1-[3-(2-Methoxypyridin-4-yl)-6,7-dihydro[1,2,4]triazolo[4,3-a]pyrimidin-8(5H)-yl]ethyl}-2H-tetrazol-2-yl)benzonitrile,(R) Ethyl4-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazine-1-carboxylate,(S) Ethyl4-{1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazine-1-carboxylate,(R) Ethyl4-{1-[2-(5-chloro-2-fluorophenyl)-2H-tetrazol-5-yl]ethyl}piperazine-1-carboxylate,(S) Ethyl4-{1-[2-(5-chloro-2-fluorophenyl)-2H-tetrazol-5-yl]ethyl}piperazine-1-carboxylate,(R)6-(4-{1-[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazin-1-yl)nicotinonitrile,(S)6-(4-{1-[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazin-1-yl)nicotinonitrile,(R)3-(4-{1-[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazin-1-yl)pyrazine-2-carbonitrile,(S)3-(4-{1-[2-(3-Chlorophenyl)-2H-tetrazol-5-yl]ethyl}piperazin-1-yl)pyrazine-2-carbonitrile,4-(5-{(S)-1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine,2-(3-Chloro-phenyl)-5-{(R)-1-[5-(3,5-difluoro-phenyl)-4-methyl-4H-[1,2,4]triazol-3-yloxy]-ethyl}-2H-tetrazole,3-(5-{(R)-1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine,4-(5-{2-[5-(3-Chlorophenyl)-2H-tetrazol-2-yl]propyl}-4-methyl-4H-1,2,4-triazol-3-yl)pyridine,4-(5-{(R)-1-[2-(3-Chloro-phenyl)-2H-tetrazol-5-yl]-ethoxy}-4-methyl-4H-[1,2,4]triazol-3-yl)-pyridine,2-(3-chlorophenyl)-5-[1-methyl-2-phenylvinyl]-2H-tetrazole, and2-({1-[2-(3-chlorophenyl)-2H-tetrazol-5-yl]ethyl}thio)-imidazo[4,5-b]pyridine.18. A pharmaceutical composition comprising as active ingredient atherapeutically effective amount of the compound according to any one ofclaims 1 to 17, in association with one or more pharmaceuticallyacceptable diluents, excipients and/or inert carriers.
 19. (canceled)20. The compound according to claim 1, for use in therapy.
 21. Thecompound according to claim 1, for use in treatment of mGluR 5 mediateddisorders.
 22. Use of the compound according to claim 1, in themanufacture of a medicament for the treatment of mGluR 5 mediateddisorders.
 23. A method of treatment of mGluR 5 mediated disorders,comprising administering to a mammal, including man in need of suchtreatment, a therapeutically effective amount of the compound accordingto claim
 1. 24. The method according to claim 23, for use in treatmentof neurological disorders.
 25. The method according to claim 23, for usein treatment of psychiatric disorders.
 26. The method according to claim23, for use in treatment of chronic and acute pain disorder.
 27. Themethod according to claim 23, for use in treatment of gastrointestinaldisorders.
 28. A method for inhibiting activation of mGluR 5 receptors,comprising treating a cell containing said receptor with an effectiveamount of the compound according to claim 1.